Right now, we have stock Continental 275/65R18 123 tires (max 3,415lbs) with 10K miles on them. They are mounted to stock aluminum 18"x8" 8x170mm rims (max load 3,590lbs). They are inflated to 75psi ...
OP. You don’t have a weight issue if the camper is loaded normally. Anything’s possible like maybe you’re carrying lead shot bags or something....lol but even your OE tires are fine with that camper. The yo-yos year its talking about may feel a bit better, but remember, it’s not the tire, it’s the air that holds up the vehicle.