I don't want to steer this thread towards a question of whether or not to double tow and we have considered double towing for our trailer loaded with a UTV; Utah has quite a few of these configurations moving up and down the road. I decided it was just way too long and one more thing to stress about while towing. To begin with, I looked at the rear sections of the 5'er frame (which, by the way is also a 3670) and decided any type of hitch would interfere with the rear levelers. Also, the dynamic moment to the frame--caused by the tongue wight--seemed to be to much for the overhang distance from the rear axle. So, we decided not to tow the UTV and, if we go RVing for an extended period of time, we will drive our vehicle behind the RV and "convoy" to/from our destination. This solution only makes sense for shorter distances, but it removes any discomfort due to uncertainty of frame stresses on your rig while double towing.