My team,
1467 is a team started by home-schoolers from Central to coastal Virginia. In 2004, we had a couple PS kids on our team and our veterans came from RAPTAR, 1132.
I say look around, see if there's a team that will let you join, and if not then start your own team. (It helps to get the LEGO grant, which is not hard to do. In 2004, we had about 2 members that were doing FLL in 2003, 4 that had done it in 2002, and 2 that had been competing since 2001.)