Those LED clearance lights really cut into your cargo capacity... LOL just kidding.
You're on the right track. 4400lbs is a good comfortable max weight on an F350 SRW, though you may want to put airbags on to level the truck, and add a rear sway bar. Take a wait and see approach on that though. There's no reason you can't take a trip or two with the truck stock to see how it feels, and add what you think it needs later. It's either going to be passable or awful right out of the gate. Not like you're going to get 500 miles from home and suddenly discover that it's undriveable (if you do something is seriously wrong that add-ons would not have prevented).
Low 3000's dry is where you want to be looking for a camper. Sounds like you've done the research and have a few models in mind.
