If it where me, I'd put some food and bottled water in the cuddy, fill the cooler with ice and beer, grab a portable radio (for tunes), put up the enclosure, and be ready for any flooding!!! Oh yeah, grab two of every animal you can find!!! ;D I never claimed to be sain :P

Seriously though, sounds like your in for a wild ride. I've read some good advice and I think if it were me, I'd probable try to figure out the best way to anchor the boat to the ground, just my preference. Whatever you do I wish you the best of luck and I hope everything works out for you.