If any of them were riding in the back, the rear axle would be overloaded. We looked at a Forester 31' Class C (an '05) on an E450 chassis. The rear overhang was close to 50% of the total length. We took it for a test drive and I stopped at a scale. With the two of us and the salesman on board, half a tank of gas, no "stuff" and no water or waste, the back axle was within 92% of its limit load.
Scary, and nearly all the '04 and later models were like that. It was the main reason we went for a Class A on the F53 chassis.
Frank and Eileen
No longer RVers or FR owners