When isabelle remnants came up the Chesapeake, we had a bit of a storm
surge. Those at the marinas survived fairly well, but if we had
another foot of surge, ever single boat would have been destroyed as
the floating piers would have come off the pilings (they went to the
top of the caps on the pilings as was).

Those on the moorings would have survived a strong surge better, but
had the wind been stonger, they too would have been very vulnerable.

In a hurricaine, you don't want your boat to be around other boats so
both aren't great. Most marina's make the point moot by forcing you to
evacuate you boat anyway. Should I have to choose one, I'd pick a
marina, then I could have the insurance agent drive to the wreckage
fairly easily