Looks like you could just add the state or whatever to the team name at the comps for clarification and keep your shirts, banners, etc as they are. They just need to know the difference as someone else said for points, etc. Otherwise, I don't know why it would matter? I renewed my KCBS membership last time because I changed my team name and I wanted it "registered" with them, but they never changed it and I just couldn't care less at this point.
The Cosmic Pig BBQ
Smokey Joe Silver