84 bigfoot fiberglass bluging, should i be worried?

Is this is a molded fiberglass Bigfoot?

If so, there isn't really anything to delaminate in that kind of construction. The body/wall is made of the same stranded fiberglass that they use for boats, not the luan-composite "sandwich" typically used these days on stick-built units.

Given the location of those deformities immediately above what look like camperjacks, I think it more likely that what you have is the fiberglass collapsing/bending/deforming under the camper's weight. That's not an especially strong point on the camper... It may be that whatever reinforcement those spots were provided with is gone- if there was ever any there at all.

Water intrusion. Expensive to fix. Probably rot.

Yeah guess it's time to sell it off as a hunting unit :-(

I expect your dad may be correct. It can be due to long term leaking.

At least the MH lasted 30 years which is a long time.