Welcome to DF Beetlebug!
Good luck with your first competition. Just go out there and have a great time!
As far as independent studio vs. chain studio, well we've had a lot of discussion on that in prior threads, and yes they tend to be - er - strongly opinionated. In the end it comes down to being an informed consumer. Shop around and take a look what options you have, the level of instruction you can obtain, the commitments you are asked to make, and of course the prices! I prefer independent studios, but others here might prefer the chains. Good luck!