UW Whitewater - just crazy drum corps crowds every year for dci Midwest
UW Madison - see above but add in finals fervor.
Dekalb/NIUE - great crowd, big show to kick off 2nd tour, and great healthy (mostly) competition with PR, scouts, cavaliers, guardsmen, blue stars, etc....
Allentown - uncomparable atmosphere for performers and attendees alike.
Bloomington - first time back in front of a live audience in over 20 years as part of cavaliers alumni corps, looked up and saw the crowd that stayed to watch and got misty eyed. The 5 or 6 standing ovations during the show made it seem almost surreal. Sharing the field with a group of brothers from every single year of the corps existence plus the crowd reaction puts this one at the top of my list. Nice field too.