I have a pickup camper that I've been covering with a tarp. It is getting to be a pain to put on (the older I get) and only lasts about 3 yrs. Been thinking about either a steel carport type structure with 1/2 to 2/3 open sides or one of these ClearSpan structures with the 15 yr fabric covers. What experience has anyone had with the ClearSpan type structure. They appear to be about half the cost and if the cover really lasts 15 yrs thats probably about as long as I'll be camping.