To the footloose guy, coming from someone who is NOT one of the weight/axle rating cops on here and having greater than avg understanding and use of light duty trucks in a lot of applications, even your "HD" F150 with the payload package is way too light of axle rating for a camper that big.
Go weigh it. You probably have 2500lb at least on the rear sitting empty. Add the entire weight of the camper at around 3500lb and your over by a decent margin on axle capacity.
Will it work for a while with all the bandaids? Probably but do you even have the payload package???
You appear to by stating the 3k payload cap but then talk about upgrading tires. The payload package comes with a 9.75" 7 lug sterling semi floating axle. Idk what the actual weight rating is but being a semi floater I doubt it's much over 5klbs, real world axle rating, not the dumbed down 6k ratings of most 2500s which have full floating axles that are really more like 8-9klb axles.
You need to get more accurate information on your whole setup and the camper dealer is NOT the place to ask. They sell campers and could care less if you haul it out of there on a ford ranger as long as they get their $.
