For information about what bands are participating, ticket costs, maps, parking, etc, for the Bowling Green Regional this weekend check out this BOA website:
http://www.musicforall.org/what-we-do/boa-marching-championships/regionals/bowling-green-oh-regional
Another great website for general marching band info (invitational schedules, scores, which schools are participating in which invitational, etc) is http://www.michiganmarching.com