by TheOtherSean » Wed Jun 15, 2016 11:59 am
I recommend checking out the Vintage Plans link under Design Resources (the menu at top of this site). There are a few designs there (e.g. Wanderbug, Vacation, Terra Cruiser) that have canned ham-ish profiles, as well as an oversized teardrop profile (Trail Scout). Also, I've ran across updated versions of one or two of these plans with larger available for sale online (one is the Earth Cruiser, based upon the vintage Terra Cruiser).
There are the Glen-L travel trailer designs, which are pricey-but-complete plans with full-sized templates. Those are for more modern-style trailers, but perhaps could be adapted.