Dry hitch weight listed for a TT is without LP, water, or gear and may not even include battery. Listed dry wt of the KZ is 340, Jayco is 405 if I am seeing it correctly. Is your Sorento hitch weight rating greater than 350 lbs? You may see some serious rear end sag. But I suppose if you drive slowly for the relatively short trip, it should not tear the hitch receiver off. Might have to actually load nore weight to the rear, not the front! I think I would go with the shorter Jayco for better handling and nighttime ventilation, and put the stuff near the back to lighten the hitch. No water in any tank ahead of the axle for travel.