Start by looking at the towbars you are interested in using. Blue Ok and Roadmaster are not interchangeable. Do you want to leave the tow rig on the coach or both. I have used a bar that can easily be undone at both ends and hidden brake system and internal tail lights. That is what I finally settle on and it is simply because we never stay anywhere very long so rigging for the road is important.
I suggest that you do as much research on your own as you can manage. These things have a lot of variation.
Matt
