I did that trip a few years ago, here is what I know. I fished some by myself in the canel along the Port Orleans resort with worms and spinner baits, NOTHING! We went out with one of the disney guides for a half day trip. He took us by pontoon boat down a bunch of canals to a lake that is closed to fishing unless guided. My 9 yr old son and I caught a number of bass in the 5lb + range and had alot of fun. We fished live shiners. That is a fun little morning if you can do that and a nice break from the crazy-ness of the parks.

Hope you have a good time.
Mike