When I towed a Jeep Cherokee I carried two Hobie Outback Fishermen on top of the toad, probably 10 years and 80k miles with no problems.
Getting older and now have a Honda Odyssey toad - too high to lift a heavy kayak up. I switched to a Sea Eagle Fast Track 465 16 foot inflatable. It was about 1/2 mph slower than my 16 foot Old Town Loon, not significant for my purposes. I've downsized that to a FT 385 12 foot Sea Eagle, and purchased a swiveling fishing chair for it. The Fast Track models have an inflatable floor that's almost rigid. Six months return policy, for any reason, and a 3 year guarantee. My 465 developed a seam leak after 2 1/2 years and the hull was replaced without costing me a penny. Weighs about 40 pounds.
Wes
"A beach house isn't just real estate. It's a state of mind." Pole Sitter in Douglas Adams MOSTLY HARMLESS