I have to chime in. Really I'm surprised with all the votes for 4x4. And I thought I was swimming against the current with my desire for it, due mostly for my living area and style of where we like to go; I wouldn't be without it.
But it does reduce payload, and with heavy campers and dual rear wheels, and the obvious thought of highway travel for heavy loads versus conditions found for 4x4 and a small camper like mine. It just kind of goes to show once again, truck camper campers are a unique set of people. We have campers to get away from highways.
What an excellent collection of good reasons for TC with 4x4! Grass? Climbing leveling blocks? I love it.