Best advice came from @bigtiller. The problem with trying to back up a wagon connected to the back end of the tractor is that's the 'non-steering' end, meaning it can't change direction nearly as fast as the steering end. Being able to change directions quickly is an absolute must when backing up another vehicle with steering. If you insist on using the back of the tractor, then everything you've learned about backing up trailers goes out the window. As someone else said, you have to make corrections earlier, and you'll find the steering of the tractor to be nearly exhausting. Swap ends to push the wagon, and you can control the front axle of the wagon a lot better, but it's still somewhat backward from what you would expect. You have to steer it to control the front axle, NOT the body of the trailer, which completely reverses what you learned (steer toward the back end of the trailer body to correct. Even pushing the wagon backward can be frustrating, but as nearly everyone suggested, practice, practice, practice. Obviously, if you can plan your route so you don't have to back it up, you're much better off. If not, having a connection device (ball or pintle) on the front end of the tractor will greatly simply moving it backward, however, you'll be on and off the tractor and turning the tractor around every time you need to back the wagon up. Inconvenient, but it's the simplest method, and usually reserved for parking the wagon at the end of use.