Hey guys, I tried the fiberglass resin & cloth repair yesterday. Come to find out my floor panel does in fact have a wood core inside the fiberglass shell which of course was cracked open. I did the job inside a 65' garage and it appeared solid as a rock within 3 hours. I stepped on it this morning and it made some creaking noise but it was 22' here this morning and despite the noise it was pretty solid. I'll let you know how its holding up in a week or so. Thanks for the suggestions and good luck bluewater.
If this doesn't hold I will cut out the wood, replace, and try again.