In your slip, in the past, are you susceptible to waves hitting boat ?
If so, you may have to move it elsewhere in marina. Waves are destructive, period.
Floating dock is good as long as storm surge doesn't raise dock over pilings.
I suggest you remove your canvas, if it gets loose in the wind will be wipped into pieces. If you have a mooring cover put it on, if not, cover any electronics with plastic and tape it sealed.
Power off to everyting but pumps, lower antennas and take anything up in air down to lower windage.
Make sure batts are charged.
Double lines and use spring lines on both sides if you can.
Get rid of coolers or dock boxes not otherwise screwed down well, you will never see them again
And hope no other boat gets loose and plows into you, so if you have to add lines to other boats if owners don't care.
If you have windows that open use duck tape and tape across the glass so if they open don't wip and snap off, like the small vent windows can.
I'd also suggest you stay away from marina if it gets so bad you have to be well bent over just to walk, it is nerve wracking and nothing can be done at that point anyway. You can fall or slip, worse be blown off dock.
If you have spare fenders at home, just set them up between you and next boat or dock all around.
No point to keeping them home.
We will see if it veers off one way or the other tomorrow after passing Cape Hatteras.