Your spacial limitations will be the 4 adults in winter condition.
You obviously know how big TCs are, my consideration would be a long enough dinette to sleep 2 adults snuggled up but long enough to stretch legs.
With that, you're looking at the 9.5-10' single slide units, IMO. They don't weigh much more than comparable 8.5' campers with a slide.
For a truck, none of the heavier campers will be within ALL of the limitations of a srw truck, not even my AF860. But I'm of the opinion that a newer long bed 1 ton will haul most single slide campers safely. May/will take some additional suspension help and you'll be at or over all factory LT rims weight ratings a bit. Rest of the truck components are heavy enough for sure.
Others opinions will vary up to needing a 45/5500 truck so that you can plop a big camper on it and it will haul the camper without any mods or squatting with big factor of safety on all components.