We have a 2015 GP 26RLS and love it. It is heavy on the pin weight,especially with 4 6v AGM batts and a 3k inverter all up front. I' have 2600# pin weight all loaded to go with full fresh water (since its right over the axles it doesn't really effect the pin weight). This puts me over my truck GVWR, but just under the Rear GAWR. I had a net decrease of the pin weight by moving my Honda 2000 gen and port air compressor from the truck tool box the the sliding cargo shelf at the rear of the trailer (OEM).
One thing to check is that some ORV 5th wheels have been subject to a recall for possible frame damage in the area of the gooseneck and pin box. Mine had damage which the factory addressed by adding reinforcement in that area. ORV was great to work with and we have towed over 6000 miles with no issues.
Great product with good support!
Mike