If you are licensed and have checked into the laws, pyrotechnics make great nighttime displays. Most people will pick these up off of the ground for souvenirs. Advertising can play a big part in the success of your turnout. Radios, newspapers, flyers, posters, and bulletins are all effective ways to gain attention. Radio stations can also be approached as a main sponsor for your festival.
Local personalities can draw a bigger crowd.
They are also able to provide the DJ for promos and contests between the bands' performances. You will want to have several people in place to help with cleanup after the festival. Be sure and get volunteers committed long before the event. If your festival took place at someone's private farm or ranch, you will want to provide them with a cleanup crew. If you held your festival at an off-site venue, such as a park, make sure you inquire about cleanup.