I had a Fleetwood 11' TC with a sticker that said it weighed 3120 pounds WITH water. Loaded and ready to camp it was around 4,000 pounds. I carried it on a 2007 Chevy 3500 SRW. With me, the wife, and the dog in the cab the whole rig was about 11,150. The truck was rated with a 9,900 pound GVWR. I added air bags and good shocks. I was not over axle or tire ratings. It handled fine for several years thru many thousands of miles.
I then put he same camper on a 2005 Chevy dually. Now, with some children and more stuff we came in at 13,100 pounds total on a truck with a 11,400 pound GVWR. Again, I wasn't over axle or tire ratings but added air bags and good shocks. Drove it for many years thru many states, sometimes also pulling a 5,000 pound boat behind us.
The dually was night and day better in terms of handling and stability. It had much less sway and much less bounce. I highly recommend a dually for a TC.
We had about 500 pounds of people and dog. 40 pounds of propane, 325 pounds of water, and who knows how many pounds of chairs, grill, firewood, food drinks, pots, pans, clothes, toys, firewood, tools, etc.
I miss my TC but with the birth of our 3rd child we decided it was just too small.
