Original sentence: Over a thousand Explorers camp in a field in Gloucestershire.The main event, a 26.2 mile night hike (a full marathon) through the surrounding hillsides, starts with participants watching the sun set.The weekend starts with a party on the Friday night, usually including a DJ and some cover bands
Edited sentence: Over several thousand Explorers camp in a field in Gloucestershire.The weekend starts with a massive party on the Friday night, usually including a DJ and some cover bands.Throughout Saturday the is endless entertainment, fairground rides etc followed by a 26.2 mile night hike (a full marathon) through the surrounding hillsides, starts with participants watching the sun set.more info