The only restriction we ran into last year was a difference of drink size at Casey's. We asked for large, but were told we could only get reg/med . This was towards the end of our trip, and this was the only CS restaurant we had encountered this problem. For Pete's sake, it's Florida. It's Hot. You really NEED a large drink.
The various discussions about restrictions and limitations that have taken place in the forum have been summarized in the FAQ, found at the top of the forum.