75,000 miles on last 5th wheel with a 2010 Tundra. Was right under numbers. Did not need new brakes when I traded it in. We did put Firestone airbags on to level it up but it only took about 2 inches.
I did find adding more air would take care of chucking. I bought a 12 volt compact air compressor and put a very long cord on it to reach the rear of truck. I found a hole in each side of the tailgate area to put the valves. I think separate valves will keep the air in each bag for weight distribution. We got hit by very high winds in Montana once and the truck handled it well. E-Trailers is a good place to look.
Quick story about brakes:
We were in Wyoming and stopped for food/fuel. To eat we pulled over by some other campers, one had a few couples hanging out by it. We got back on the road and the passenger mirror add-on started falling off. My wife grabbed it and the drivers one started the same. We took the next exit to fix it and I noticed the trailer a little heavy. After stopping I looked at the brake controller and it was not working. We checked and the plug from the truck to trailer was unplugged just enough not to be out of the hole. Truck stopped the 9000 pound camper with no problems on a down hill exit ramp. It was a Tundra not a Chevy. Fellow campers are the greatest people.