We just purchased a 2021 Grand Design 2800BH and are towing it with our 2021 NV3500 SL. We weighed at the scales before our first trip and came in at 15,720lbs. We are 800lbs under the RAWR and about 300lbs under the GVWR of the trailer rating of 7995lbs. Interestingly, the trailer has 4400lb axles, so the trailer GVWR seems a bit low. We are within limits now, but could potentially hit the 16,000lb GCWR while still being well under all the other limits. What are the implications of this?