[skyking]

If you cut some plywood bulkheads in the shape you want, and then put thin strips on it, you don't need steam if you go really thin. Then glass and epoxy over that.
turn it over and cut away almost all of the bulkhead, it is no longer needed for strength.
Think along the lines of a cedar strip canoe.
Building A Cedar Strip Canoe
you don't need fancy wood for a camper, just rip down what you have.