Going through photos, I have shot at the 20th Maine Co.G at a event or two before, and they seem like a great bunch of guys. Haven't personally sat down and talked to them from what I can remember (perhaps I have?). If I do make it to Moorpark this year, I'll have to look on the Yankee side of life for them a bit harder.
As for hats and clothing like we talked about before, definitely shop around with different sutlers online and at the events. I know for a fact that most of the union companies have a "slop chest" for the new fish so don't get pressured into buying everything the first time out; it's an Investment. Try on a jacket at the event, see how you like the feel of it, pants, shoes, hat size and preference, and I'll send ya some less expensive websites I get items from that are close to California, cuts down on shipping. (I know your parents would like that, mine did when I started!).