Tracey:
The Avenue is my favorite store. I wear a 28/30 and think the Avenue is the best store. I am not sure if they have one in Orlando or not, but they do have a great website. Also, sign up for email coupons because they have some great deals. they are especially great for black friday. Some other great stores are Lane Bryant (they have this one in Orlando), Catherine's, Deb Plus, and Fashion Bug. i'm not sure which of these are in Orlando but they all have great stuff. Finally, check out bcoutlet.com. It is a plus size website and they have great clothes for great prices.
Good luck!