I recommend that you in depth evaluate your fuel economy needs. I drive to Key Largo from Ohio to go diving. Fuel cost isn't an issue. I think I tip more money, than what I spend on fuel. Many people over value fuel economy woes, and end up miserable in a too small truck, or the wrong camper. Down payments to switch vehicles eats up years of fuel savings.
Also evaluate exactly what kind of sleeping? Slide in camper? Simple shell? RTT? I want AC and heat, so a hard side camper is the way for me to go. That's instant 250/2500 territory, even for little ''1/2 ton specific'' campers. I'll likely be stuck in a ground tent for years to come though.
The Ford 6.2 can get decent mileage with the little xl wheels and tires. 37" tires, obviously cost more to roll.
As for fuel octane requirements, and the ecoboost............the Ford 6.2 and Dodge prefer higher octane fuels as well, if you want the power output your window sticker listed.