With that thing weighing 1000lbs aren't you worried about going over your payload with passengers and gear?
GVWR (5900) - Base weight (4310) = 1590lbs for payload. 1590 - 975 (dry camper) = 615 lbs leftover for myself, wife, dog, water, food, and gear.
It'll be close, and maybe a touch over occasionally, but I beefed up the suspension with after market air bags. Considering I will only have the camper on for trips, I'm not too concerned. People have been hauling lightweight campers like these in mid-sized trucks for ages - and the Colorado has greater capacity than those older Tacomas, etc.