Good comments
Lots of good thoughts and ideas so far. But there is no definitive answer that will suit all situations. If you can't get your boat above a tidal surge, being on the hard isn't going to do you much good. In the canals where I live, most anchored their boats in the center of the canal. Tied off to whatever they could find. I anchored mine on one side, and tied to my dock on the other. With enough slack, I thought, to cover any surge. The aft dock lines went over the pilings, allowing the boat to swing around. Luckily there was minimal damnage. The only other boats in my immediate area the suffered were the ones that were just tied to the dock. One sunk and one ended up in the yard. Right around the corner at the marina, the docks floated over the pilings and all were damaged or destroyed. I think your response to a storm will vary, depending on your individual area and circumstances. But no matter what you do, do it in excess. Make sure you have chafe gear that works, and lines that are much stronger than you think will be needed. Consider the impossible to be very possible. The power of mamma nature is awsome.