Pulled my tanks this winter and re-coated them with Coal Tar Epoxy. Not hard to remove. Like others said, access through panels and remove wedges and screws.
I replaced all my hoses for peace of mind. I have to say, all the hoses I removed were all in great shape and not even dry rotted. Inside was smooth and supple also. In '92, they were already alcohol safe apparently, but while I had them out, just replace them and don't look back.
Upon re-installation, I filled in some of the gaps with PVC board and new screws. Used some sealer around where the screws would go into the fiberglass to enure no water penetration.
Make sure you do a good thorough cleaning of the tanks, and re-coat them so they will be protected long term. In the bad spots where there was some corrosion, I used Marine Tex Epoxy, then sanded and coated with the Coal tar.