for what it's worth
Let me first disclaim any expertise on hurricane-proofing. But here are a few ideas- NOT based upon firsthand hurricane experience: 1. if you have a bowcleat for your anchor rode, you may want to distribute the load to other points as well, maybe equalize them so the load is spread out. I'm thinking possibly the winches would offer a secure secondary tie-off (backup or equalizing lines led to the bowcleat tie-off). The tabernacle may be questionable. If you have a tensioner, that might be of some help with chafing. Protect against chafing anywhere you see potential sharp corners. 2. Consider the possible swing angles of your scope and consequences on the shoreline. A narrow river might force you to shorten your scope, and it might reverse itself with backwash, doing weird things with the direction of load on your anchor(s)? 3. Get as much line (scope) out as you can. More than one anchor sounds like a good idea, maybe in a "V" configuration and equalized as best you can, so the load is halved (as best you can anticipate the direction of pull). There will probably be a lot of rise and fall with the surge. It might be wise to consider the contours of the bottom as waves really stack up where shorelines drop off steeply 4. Can you add weight to your rode and/or anchor somehow? 5. Maybe several layers of duct tape over hatches and windows, perhaps with plywood sandwiched in over the windows? If you don't mind the repairs afterwards, it might be worth a few screws or bolt holes to really secure the plywood over windows. Do you have a bilge pump with automatic switch? For what this is all worth, eat the fruit and spit out the seeds. Hope it turns out ok for you and your vessel. Good luck.