My daughter was on a FLL team last year and it was really fun! My dh was in charge of taking her to the meetings and talking programming with her, I ended up being the "spirit mom" for the big meet.
My advice is to have a parent take over the spirit stuff, helping the kids make signs and to dress up funny for the events. This will free you up to get deep into the programming while making sure that the kids have a silly time too!