Your camper looks awesome! You've done a great job cleaning it up.
I'm looking at your weight slip... 8060 on the drive axle. Look at the sidewalls of your new tires and see what the weight rating is. I looked it up on Tire Rack and it's 3415 per tire at 80 psi. That's 6830 lbs for both tires. You're 1200 lbs overweight.
It's one thing to be over your axle weight (I do that every time I load my camper), but I NEVER exceed the tire ratings. I hate to be the one to break the news, but you need a dually or a much smaller/lighter camper. Your tires are overloaded, and despite being Michelins, will eventually blow out even if you keep them at 80 psi. They aren't meant for that kind of weight.