Just bought a TT and don't have a TV for it yet. One friend, who tows a lot of heavy things, recommends nothing less than 3/4 ton P/U. A mechanic friend, who we will be camping with, says his 1/2 to...
Other comments aside, DW & I will never get a 2WD TV again. It's not often you need 4WD, but on those rare occasions you do it's worth its weight in gold.
99% of our camping is done at a lake. More than once after a day on the water we've tried to pull the boat trailer up a wet ramp and started sliding backwards. If not for 4WD... It's also invaluable around the farm, especially when it's wet.