That is where the alligators come in, silly. Besides, that river is very shallow and obviously you know nothing about building boat docks beyond the water’s edge. They will just build a very long one away from the water’s edge without decking.
Really no need for the smart a** remark. My point is that for all the talk of a fence, I do not hear proposals as to how to logistically and physically construct such with a near 1300 mile border that includes the river and a great deal of tough rural terrain and lots of private ranches. Your suggestion of boat docks is duly noted. You could have kept your comment to that.