I don't know if it still holds true but the last two times I did it you could buy an F250 for LESS then a similarly equipped F150 when you spec'ed them out on Ford's "Build Your Own" site.
The EcoBoost engine gets great mileage running empty but SUCKS gas when loaded. An acquaintance of mine told me this about his wife's F150, as did a guy I just talked to at King of the Hammers this weekend who had used his to tow a heavily loaded trailer to the event.
Also keep in mind the load capacity ratings on 1/2 ton trucks are the MAX they can carry for a SHORT distance. Such as bringing home a load from Home Depot. While the ratings on 3/4 ton and up are the weights they are expected to be able to lug around day-in-and-day-out for years.
It makes no sense to spend thousands on suspension upgrades for an F150 when for less money you could simply go with an F250 and skip the bolt-on suspension crutches.
Campers also ALWAYS end up weighing MORE then you think they will.
If you don't already have the truck then find the camper you want and buy the truck you need to carry it. To do it in the reverse order is a way to end up with a camper that you are unhappy with due to the compromises you made to fit it to the truck.
