Has anyone ever made one of these? I'm looking at getting into a lake that has about a mile hike in, and need something simple. I'm not going to buy one, when I'm sure I can build one. My Google searches are coming up empty, with few exceptions. I'm sure the terrain is not all that smooth heading into the lake, thus the bike tire. I know I can build my own, but I'm sure someone here can put me on the right track. Any ideas?