If payload is the single thing you’re after then I would skip the Raptor and Power Wagon. The payload ratings of each are only 1,200 pounds and 1,500 pounds, respectively. However, if the pop-up TC you have in mind is comfortably below these ratings then these trucks are pretty outstanding for off-road exploration. Especially the Power Wagon which comes with a Warn winch, lockers, size 33 tires, and a quick disconnect front sway bar.
As for cross country travel, both trucks handle very well on pavement.