The Utah stadium pictured is Rice-Eccles at University of Utah, not the one at BYU. Even though Rice-Eccles is a great stadium (I attended 2002 Winter Olympics opening ceremonies there), I believe it is not large enough to host a drum corps championships.
It would be great to have championships here in California for once and hope it will be in San Diego.
What about the new football stadium being built in Phoenix? Yes, it's hot there, but I'll take dry heat over heat & humidity anyday.