Not trying to be a dick. I certainly don't want to discourage anyone from taping.
But a few suggestions.
TS is helpful when you can provide technical specifics - like your battery question is fine - you have clearly described what you are trying to accomplish and stuff. But a lotta people hang around in a forum or two, and don't visit other ones. And a lotta people only scan subjects for things of interest.You probably just asked it the wrong way and in the wrong place.
The best way to get a technical response is to post it as a single question in the related forum - in this case "Remote Power". Remote power "enthusiasts" (enthusiast maining you have a love/hate/both relationship with remote power issues, LOL) tend to hang in "Remote Power".
Take me for example. I'm not a remote power "enthusiast" because I run a Marantz that takes 4AA rechargeables. That's it. I pop em in pop em out, recharge them. I don't love or hate remote power because it is a no brainer for me. The most complicated Remote power gets for me is I try to run too long when I shoulda changed batteries in between sets. Just a slightly different variant (dumbass variety) of the no brainer.
So I can't tell you jack about remote power, and same is true for a lot of other people here. But somebody else can tell you all about remote power - if they can find your question. Like with a subject line like "DIY UA5 Battery Pack Help!!!"
People love to show off their technical knowledge but you have to help give them the opportunity by making your questions easy for the people that can answer them to find.
As far as general mic setup questions. Again not to be a dick, but most people are not going to respond unless you have at least looked at the options. There are only a few, so few that everyone just knows them. DIN is 90 Degree angle 20cm. ORTF is 110 Degree angle 17 cm spacing.
Pattern basics are described in various places. This is a good beginner place to start:
Basics:
http://www.oade.com/Tapers_Section/faq-mic.htmlPictures for SDs:
http://www.oade.com/Tapers_Section/micsetup.htmlBefore long you'll know the config geometries by heart.
Again not to be a dick, but if you don't know them, how can we know if you even can run them? That's not a insult, it's a valid question.
For example, I run LDs on shockmounts. The patterns are the conceptually the same, but the physical setup is quite a bit different from small diameter mics. I can run all the near coincident patterns. But I don't have the right stand hardware to be able to run XY. (Truthfully I could ghetto rig a vertical XY but until you get comfie with your gear, try to stick to stuff that you have hardware for so you know a mic will not fall off midshow :-)
When to use them? Ahh, the magic question. There are some basic guidelines, but that is the art of taping. It's an empirical kind of thing. The best way to get an idea of how and where and what to setup is to first of all, learn a little bit about the patterns, then come here and search and see if you can find someone who has actually taped at the specific venue you are going to.
If you have absolutely no idea, DIN or DINa and is usually a good general purpose default config.
Finally, this sounds like an "evening affair" - Furman Singers, Boston Pops, $75 tickets, presumably in a university hall?
As a general rule when in Rome do like the Romans. To some people (me for one) that means don't tape if you are not welcome. To some people that means stealth if you are not welcome, but that's another debate altogether.
In any event I kinda think the Romans tonight are not gonna be down with open taping, and C4s in a balcony is not stealthing. Does not hurt to try, but ...
Good luck.

Be patient. Get familiar with your rig. Learn the patterns