If looking at new trucks, 350 is the obvious choice, but I think you know that. If looking used, you find a really nice 250, I'd go for it, if it has the upgraded 18" tires/wheels, which will handle same load as 350. My 250 has HD service suspension (350). Many 2011 and newer 250 have the camper pkg (350 suspension) which would work for you. If no added pkgs, you could upgrade suspension, by means of your choice, as long as the tires/wheels can handle the load.
Can't help on FR products from experience, but I believe the CC is at least one of their upper end builds, if there is such a thing.
Jerry
