I was thinking earlier that contacting the CG might make sense as they may not have been contacted on the fire. Same with FWC.
Donna overall likes where she is and the dockmaster has shown no interest in this matter, so she runs a very tight line between trying to get their attention and making so much fuss they ask her to leave. I might contact the owners of the marina, escalate beyond the dockmaster but it has risks. That's something only she can weigh. Contacting her own insurer really doesn't make much sense to me until she wants to be told to leave, as that would be their likely instruction and would leave her with no choice. Her insurer has no power with the dock. Moving somewhere else for a couple of weeks may well make sense.
How have the other slipholders reacted? It appears the fire couple has a tight relationship with the dockmaster, but do they have the same with other slip holders? I'm afraid this may be a case where you're 100% right but in the minority.
I'd make a major issue out of this if I had somewhere to move I'd be just as happy as this marina. Otherwise, I'd keep pushing but not so much as to be told to leave.