I'd say figure out a mount, and run what you have for now. You can pull a good tape with that. If you are lucky, there will be other tapers at these shows with other rigs, and you listen afterwards and compare.
I suggest would play with the different mic setups, like XY, DIN, ORTF and that kind of thing, which effects the result sound quite a bit. Trying different combos doesn't cost you anything. Cut up a wire coathanger, use a little duct tape, make something cheap to run these tests and decide which pattern suits your ears, and make a "nice" mount for that pattern.