I did a 17' Wells Cargo, just made my 2nd camping trip with it, performed well.
Propane and electric (we used the gen for coffee in the mornings).
Two burner stove and sink with 12 volt water supply, 21 gallons in 3 jugs under the sink, plus 5 gallon waste can.
The 900 Ranger fits, but you have to walk sideways to get past. We just used cots on the last trip, but I believe a person could make hinged cots on the walls, but you would need to store them under the UTV in transit. This trailer is 7' wide.