Full disclosure first, I am a sled owner but also a proponent of knowing your limitations.
What about a size restriction on all motorized boats on certain rivers? I currently am working on a 12 foot sled with inboard jet power just for very skinny water because I don't want to run over fellow fishermen in a 20 footer. I have to go 30 mph plus in shallow water in my big boat and its not safe in confined spaces. This is just a question...not provocation.