Does anyone have new f350 super duty and an older camper?

Lance come to my new truck :)
Should add that my Fleetwood is basement model, when Lance is not.
Basements usually come with higher sides, but beside height, bigger TC also have "steps out" where at the rear it is wider.
When Fleetwood has the step out on 1 side, Lance has it on both sides, leaving me not much more, than 2" clearance in tailgate opening.
I heard some Dodge has narrower opening, so Lance might not fit there.
With so many TC variations, there is no "one shoe fits most".
Keep the tape measure handy.