Just found out about a month ago about the caso-rolla campers. They were built in my home town of St.Jean-Baptiste, Manitoba. Builder/designer was Don Touchette (electrician in town) They had a small factory located in town and never produced to many of these. Rare find as i assume most of them were probably broken down and used as utility trailors. From what i've heard they were very heavy and somewhat unpractical.
Designer wanted a small trailer to pull behind his truck but did not like the canvas of a traditional pop up trailer so he went and designed this one. Its a hard top, hard sides "popup" trailer. Dont have any more info then that and never anything online about it neither.
Very rare, i suspect fewer then 100 were ever built.