11 or 12 year old camper

Kayteg1, why do you think fiberglass doesn't last 30 years and aluminum would with the same level of care? You can easily see trashed aluminum campers all over the internet. Aluminum is susceptible to galvanic corrosion which fiberglass isn't.

Most of the damage in RVs and what needs a rebuild is not the shell, but the interior and appliances.

In any case, there are 50 year old fiberglass RVs, too. ;) You can google it.