It looks like both Tool AND Puscifer will be playing in MN. here is the lineup
"Headliners for the festival are Tool (performing on Saturday the 23rd) and Dave Matthews Band (on the 24th), with support acts ranging from last year's SoundTown headliners the Flaming Lips to Tool frontman Maynard James Keenan's side project Puscifer. "
http://blog.thecurrent.org/post/2012/04/rivers-edge-music-festival-lineu...