Its no big deal for sleds you just have to know where your going. Several places are very skinny with lots of rocks. I would have someone show you the routes before I went in blind. There are places that you could put in your boat and run up river quite a ways before you run into anything to worry about. Lenore is a good location for that. You could also talk to someone at one of the major boats ramps and they would probably let you follow them.