I know you may be a little peeved at the notion that this pastor might not believe you or trust you but all in all it's much easier just to comply with what his stipulations are. I'm also in a Christian band and am blessed to have a studio to practice in, but in your case I think it's easier just to let the pastor talk to your pastors. Who knows, it may lead to a bond between the pastors and open up some doors for you guys.
OTOH, if one of you guys were playing the religious game, (talking the talk but not walking the walk), then there would be some room for worry but if all you guys are sincere then it should be no problem at all IMO.
OTOH, if one of you guys were playing the religious game, (talking the talk but not walking the walk), then there would be some room for worry but if all you guys are sincere then it should be no problem at all IMO.