There are plenty of choices for hitches out there, most of them good. Some food for thought when picking a 5er as it sounds like the truck is lifted if only by the tires. Make sure the RV has enough height on the overhang so that when level it will clear your bed rails by 6". If not, make sure you can alter the trailer by flipping axles etc. to make it higher. Some older trailers may not even be an option for you. Measure the height of the hitch you will need to correctly level the trailer. Most are adjustable but some popular ones start at 16" which may be too high for you. Other brands can be ordered in other than standard heights. Just do all your homework in advance.