My advice:
Get The boat rigged as if your going to tow her on the interstate at 70 mph. All rigging and spars down and secure. Take all the running rigging off and store somewhere else safe. Take all items in the boat...hand bailers, anchors, et cetera out.
Leave nothing ton the boat that can flap. Get the boat somewhere that the storm surge won't reach, if possible. Otherwise, tie the trailer to something immoveable, like a big tree, or a reallly solid fence post. Make sure the boat is secure to the trailer. Any drain ports or Elvstroms you have in the hull, leave open to let rain/storm water out after it recedes. Try to make the location somewhere that if a tree trunk or branch or other large structure collapses that it won't hit the boat.
Most importantly... The boat is just a thing, although we view them as females ( for the most part
) Don't risk your life over that. There are other Day Sailers out there. There's only one of you.
Good luck, I wouldn't wish this on anyone, having been through Ike.