Have you looked at the weight capacities of the small bunkhouse models? Figure 300-450lbs of people, that only leaves you 600-400lbs for water, supplies, etc.
1975 American Clipper RV with Dodge 360 (photo in profile)
1998 American Clipper Fold n Roll Folding Trailer
Both born in Morgan Hill, CA to Irv Perch (Daddy of the Aristocrat trailers)