I'm confused - Suburban 1500 tow up to 7,500 lbs?

One thing to think of also is if your doing an extended long trip storage is going to be very important. That might have some sway as well with the camper as it's pretty easy to fill up smaller trailers.

I had a Keystone Outback 21RS, then we "down graded" to an WolfCreek 850 slide in truck camper. One thing we always ran into was lack of storage, it wasn't bad at all for a weekend trip, but on our two week trip the cab of our truck got pretty full.