Hey, Fort Myers here,
We have the same type of "spillways" here that I fish alot. I have done really great throwing a black horny toad weightless and letting the current take it while paying very close attention to my line. You will see when they take it. Also, look for barriers under the water that the fish will hide behind waiting to ambush forage. Also pay close attention to where the current looks strong and try to find an area of calmer water, sometimes these calmer pockets will hold a number of bass, at least in the spillways that I fish. I also fish a football head jig, in any color, and that has produced alot of fish. Cast up to where the water is falling into the canal and let it sit, sometimes you will be hooked up up before it gets to the bottom. Line watching here is also very important, especially with a jig. Dont let these little areas fool you as I have caught a number of bass in the 4-7 pound range in these areas sometime. Also, 4 inch swimbaits in these work very well, try the spro BBZ 1 shad, and another that not alot of people like but I have found success with is the revolution shad, they will absolutely slam these little swimbaits. Let me know, maybe we can fish sometime.