The thoughts on braking did cross my mind. I will not be going fast though. I also have gears so the tractor should be able to pull some weight. I might break my cranks though.

I was hoping to find some advice from forward thinkers (or maybe just plain crazy) like CliffordK Decal or not to Decal - Bike resto-mods

I'll send some links of the hitch ideas once I'm on a real computer. It all should work if I go slow.