FWIW, with cardioids you can yell pretty damn loud and as long as you are directly behind the mics they will pick up almost nothing. You do have to be RIGHT behind though, 180°. The more you get off this rear axis the more they will pick up.
Anyway, sounds like you just want to have a memory from the show and don't care that much about how HQ it is, just go have fun and do your thing, then afterward listen over headphones and decide whether you want to act the same way next time you go out and tape. I think everyone has different standards for how inanimate and quiet to be when stealth taping. I can tell you that if you are moving the mics around a lot it will sound swooshy and phasey, as corkscrew said. Also it will sound like crap if the mics are rubbing on your clothes and the like.
Happy taping,
Ben