Help With Figuring Out Which Trucks Will Work For A Camper

The difference between F350 vs F250 (or equivalent) when both are SRW isn't much. However, the F350 is rated for quite a bit more payload. Obviously, the DRW F350 is a lot more truck.

Based on your description, a F350 would be the right choice or 3500 in GM or Ram versions. You should double check the payload for the model you plan to buy. If used, look at the door sticker.