We also had a 13' Boler for many years. They were one of the early fiberglass "egg campers". I have read they originated in Canada in the late 60's and were named after the Boler hat because of their shape. I have also read that both present day Scamp and Casita have roots in Boler.
2012 Chevy Silverado 1500 with factory brake control
Equal-i-zer 600/6000 hitch