Hi: mark b... I would feel better towing a 19'er with a bit more margin of safety room in the tow cap. 4500#s-5000#s would be my feeling...but thats just me. Our 4X4 Nissan Frontier has a tow cap of 6100#s. Dry weight of the 5.0 is 2620#s total. Road ready to travel it's 3640#s at the Agro Mart scales so thats over 1000#s of food, water, propane, gear, and clothes. It can add up fast.
OTOH you already own the Toy. Highlander so what would you have to add to it to increase its tow cap? Suspension helpers, trans. cooler, equalizer hitch? The tow vehicle is the variable in the equasion. We kept the '02 GMC for a couple of years and then traded it off. Alf
escape artist N.S. of Lake Erie