I've been to Bonnaroo, and had to take someone to one of those "recovery" tents, and she got nothing but some water and a bed to lay down on. No Jesus talk, no lectures, no nothing. So your paranoia is unfounded. The reason they get all that money to get those huge acts is because its been an extremely well put together festival since its inception, and year after year it turns out to be a positive experience for everyone involved. Like I've stated before in other threads, its a fantastic festival, especially for its size, because practically everyone there is there for the music first. Yeah, people party and some get crazy, but given a festival that size where there's tens of thousands of people, and you have as few incidents as they do, that's saying something.
I think that this jazz tent that Blue Note is putting together is a good idea, and if its put together as well as everything else at the festival, it should serve a good purpose at this mostly-rock festival.