The fishing pier right at the resort! There's even a sink there to clean up whatever they might pull in, if you're so inclined.
You can buy bait at the recreation rental window. They also sell crab nets there.
There is also a freshwater lagoon over by the office complex across from the resort. I have actually seen (and heard) fish jumping there. Not sure if it's permissable to fish there or not; I would assume it is, since it's a man-made lagoon and the fish had to have been stocked...