This was my prep for Florence in Sept 2018. Boat was aboard MCAS Cherry Point marina; a pretty good hurricane hole off the Neuse River. As suggested above, not only was all canvas stripped, but I completely emptied and stripped the interior of everything not permanently affixed, batteries, cushions, compartment boards, etc, everything. I figured worst case if it got damaged and took water, there‘d be nothing floating around inside as a hazard to enter the boat, or unnecessarily ruined like all the mattresses and cushions, etc.
Doubled all the lines and found other places to add more. I was two weeks from taking command of my squadron and I figured the boat was probbaly not going to be there when I came back and with my looming responsibilities, my sailing would be on hold for a long time. Meanwhile, a much worse event would my boat breaking free and damaging someone else’s due to my negligent failure to prepare as best as possible.