Trackrig wrote:
My heavy TC stayed on the truck from the first time I used it in the spring until snow came in the fall and I needed the truck for snow plowing.  I did this for about 15 years and I never noticed any harm to truck leaving it on all summer.
Mine is in a similar situation.
Truck and camper are 10 years old.  They meet up and become one in the spring, and stay together till fall, most summers.  The exception to that was this past summer.  I took the camper off twice and used the truck for truck stuff, or towing my Nash 17k.