Dmack
I have a Hummer3 that I tow I use the PATRIOT by Blue Ox. It is a easy set up, light weight, an has wireless remote that goes in your RV. The people at Blue OX are the BEST just call them with any Questions and they will walk U though.
The PATRIOT also has a built in battery that helps from running it on your car battery all the time. the battery in the Patriot will last for about 3 hrs. Then you can plug it into your car outlet. Or you can do what I had done.
I had them hook it up to RV battery (Motor) so the battery is always charging when the RV is running. The Patriot comes with extra wires so you don't need to buy any. I set My Patriot on 3 and it works just find. It also has a thumb bar that you can add pressure to the car brakes if you need them going down the mountain. You can also turn to zero when on flat ground and do not need it for braking. Set up is very easy after U had done it a few times.
Hope this helps.
benhogan7