A band that's known for being difficult, or a band that will be difficult playing with Megadave? Basically count out any band that is slightly anti-religion at all or doesn't jack off Alex Jones.
07/22 - Melt-Banana
07/26 - Forever Came Calling & Primitive Man
07/30 - Warped (?)
08/05 - Knockout Kid
08/07 - Fireworks (?)