Question: Which annual gathering that takes place at Black Rock City did Further Future want to change the  "vanish and leave no trace" principles instilled in those who participate in it 

Context paragraphs:
MINIs on the Dragon: MINIs on the Dragon is an annual gathering of MINI Coopers in Robbinsville, North Carolina.  Started in 2003, the event takes place over the first weekend of May each year.  The event is in part named after the legendary section of US 129 known as "The Dragon" which runs from North Carolina to Tennessee and has 318 curves in 11 miles.  The event attracts over 900 attendees and over 600 MINI Coopers.  The record was over 800 cars.  The event primarily is attended by the newer BMW MINI Coopers but also attracts several classic Mini Coopers each year.  This is the largest grassroots MINI Cooper event in the US each year.  The event "headquarters" is in Fontana Village, a quaint vacation resort that was originally built to house the workers as they built the Fontana Dam during World War II.  Each year MINI owners from over 30 different States and Canada make the pilgrimage to Fontana Village to participate in this event.  Starting off as a three-day event, it has currently grown into its newer format of four days and includes a vendor alley, group dinners, a Brewswap, Bingo Night and a host of various drives and other activities, there is the Friday morning Dragon Parade, the Saturday night Midnight on the Dragon.  Brave MINI's gather at Deals Gap and at 00:00 depart and drive the Dragon.

Further Future: Further Future is a transformational festival held in southern Nevada.  The Further Future model is, “a shared experience that’s beyond our future,” and, "promises a carefully curated slate of, business and cultural leaders, chefs, mixologists and masseuses".  Further Future caters to a techie club of invitation only exclusives in a controlled setting.  Further Future's membership is currently at 4000-5000 and is structured around a corporate retreat setting.  Further Future, located on the Moapa River Indian Reservation, claims to offers an "all inclusive" festival experience, different than the, "vanish and leave no trace" principles instilled in those who participate in Burning Man.  Further Future is the brainchild of a group called Robot Heart, an art and music collective known for the parties it throws during the annual Burning Man gathering in Northern Nevada's Black Rock Desert.  The Further Future event, "aspires to be a gathering of people with the common goal to spend time together celebrating the infinite possibilities of the future, without necessarily being shackled to the dictates of the past or the cycles of present-day society."  the invitation-only festival for as many as 5,000 people, runs from April 29 to May 1.

The Kings of Clonmel: While at the annual Rangers' Gathering, Will is informed by Crowley that Halt will not be able to attend as he is investigating things in the west of the country.  A mysterious group of people are going around, recruiting people and stealing gold in an unlikely fashion.  Meanwhile, Halt is watching the group, who are acting in a small village called Selsey, in Araluen, although not governed by any fief.  He manages to stop them burning the boats, which they put as an "omen" to their god of gold, Alseiass.  He finds that the plot to build a golden altar that is fake, they are stealing the gold, and making the altar out of wood, coated in thin layer of gold.  He manages to capture their leader, and expel the group from the village.  Halt is puzzled, as when the leader sees him, he says, "What are you doing here?" .  Halt is sure he and the man never met before.  Back at the rangers Annual Gathering, two Ranger apprentices graduate at a ceremony, where Crowley asks Will to take care of three more apprentices for a while.  He does this, and Crowley tells him that he has been moved to Redmont fief to share half of it with Halt.  It is where he grew up, and where Alyss, (his girlfriend) lives.  Halt's wife, Pauline also lives there.  Will rides to the fief, where he is greeted by a feast made by his childhood friend, Jenny.  He greets Pauline, and Crowley, then Halt arrives.  Crowley assigns Will, Halt, and Horace (Will's current best friend, and a knight) to investigate Clonmel.  Halt tells them he knows the king, and when they ask how, he tells them he is the King's brother.  They go around, investigating the Outsiders (the group who are stealing gold).  When Halt's brother tells them he made a deal with the Outsiders, he is knocked out by Horace, and Halt takes the king's place (they are twins).  The Outsiders' leader, Tennyson, is angry, and challenges Horace to duel his two giant bodyguards.  Horace accepts.  Will meanwhile, is investigating a camp, and he sees that Tennyson has recruited three Genovesans (foreigners; assassins).  He tells Horace and Halt this, and Halt is expecting treachery from Tennyson.  The duel proceeds, with Horace barely winning against the chain and mace used by the first giant.  Horace is then drugged by the assassins, causing his eyes to waver a lot, and he is unable to see clearly.  Will shoots the second giant in the arm, after which he manages to accuse Tennyson.  Tennyson escapes, though not before killing Halt's brother.  Halt abdicates the throne to his nephew, Sean, a warrior and worthy king.  They begin to follow Tennyson's trail to Picta, thus ending the book.

John Law (Burning Man): John Law is an American artist, culture-jammer, and co-founder of the Cacophony Society and a member of the Suicide Club.  He is also a co-founder of the Burning Man Festival (a.k.a. Zone Trip #4, a.k.a. Black Rock City) which evolved out of the spirit of the Cacophony Society when a precursor solstice party was banned from San Francisco's Baker Beach and merged with another Cacophony event on the Black Rock desert in Nevada.  Originally from Michigan, Law has lived in San Francisco, California since 1976.

Black Rock, Buffalo: Black Rock, once an independent municipality, is now a neighborhood of the northwest section of the city of Buffalo, New York.  In the 1820s, Black Rock was the rival of Buffalo for the terminus of the Erie Canal, but Buffalo, with its larger harbor capacity and greater distance from the shores of Canada, a recent antagonist during the War of 1812, won the competition.  Black Rock took its name from a large outcropping of black limestone along the Niagara River, which was blasted away in the early 1820s to make way for the canal.

Black Rock City, LLC: Black Rock City LLC is the company that organizes the annual Burning Man event ending on Labor Day, on the dry lake of the Black Rock Desert in northwestern Nevada.  Although the organization is largely volunteer-driven, it has a for-profit form.  Its mission states that its efforts are, and its primary goal is, to establish community.

Burning Man: Burning Man is an annual gathering that takes place at Black Rock City—a temporary city erected in the Black Rock Desert in Nevada.  The event is described as an experiment in community and art, influenced by 10 main principles: "radical" inclusion, self-reliance, and self-expression, as well as community cooperation, civic responsibility, gifting, decommodification, participation, immediacy, and leaving no trace.

Vanish (film): Vanish (stylized as VANish) is a 2015 thriller film written and directed by Bryan Bockbrader.  It stars Maiara Walsh, Austin Abke, Bockbrader, and Adam Guthrie.  Tony Todd and Danny Trejo appear in cameos.  Walsh plays a kidnapping victim who both manipulates her captors and becomes a pawn in their individual plots.  The entire film takes place from inside the van used to kidnap her character.  Dark Sky Films released it to video on demand and on DVD on February 24, 2015.

Black Rock Harbor Light: Black Rock Harbor Light, also known as Fayerweather Island Light, is a lighthouse in Bridgeport, Connecticut, United States which stands on the south end of Fayerweather Island and marks the entrance to Black Rock Harbor.  The first lighthouse at the site, built by Abisha Woodward under contract with the United States government, was a wooden tower that was lit and made operational by 1808.  A storm destroyed the tower in 1821 and the current, stone lighthouse was erected in its place in 1823.  The Black Rock Harbor Light was an active navigational aid until 1933 when it was replaced by two automatic lights offshore.  The beacon was subsequently given to the City of Bridgeport in 1934.  Two significant efforts during the 1980s and 1990s served to restore the aging tower and the light was relit as a non-navigational aid in 2000.  Black Rock Lighthouse is listed as a contributing property for Bridgeport's Seaside Park historic district.

See You at the Pole: See You at the Pole (SYATP) is an annual gathering of thousands of Christian students at a flagpole in front of their local schools for prayer, scripture-reading and worship, during the early morning before school starts.  It takes place on the fourth Wednesday in September.

Supporting paragraphs: Further Future Burning Man
Answer: Burning Man