Pictures would help. Go to user CP link top left corner of the page, albums and pictures link in the CP (Control Panel) upload the picture, copy the link from under the picture after it uploads and paste link in your post.
Don't know the age of your camper but the outer white gel coat gets stiffer than the fiberglass with age and can get tiny surface cracks due to the fiberglass underneth flexing more than the gel coat surface can. These are cosmetic. If the cracks go down into the structure of the FG or clear through that is more of an issue.
You might find page 5 of this pdf of use, has drawings of the different types of cracks and what typically causes the pattern of cracking diagramed.
Even cosmetic surface cracks it's a good idea to at least coat with a wax or polish and try to seal to keep water out of the crack, don't know if you have to deal with freezing temps but water in the tiny crack that freezes makes the crack get bigger over time.