In the days before hurricane Wilma blew through the east coast of So Flo (I lived on a salt water canal) and I had plenty of lines from my Pursuit tied to my dock pilings, the deck, seawall AND an anchor fore and aft with enough line to accommodate rising water. The marine and hardware stores were totally out of any type of line to secure boats with.
During the storm I looked out my back window and there were boats spiraling past my boat that had ripped free of their docks, pounding my boats starboard side which luckily I had secured many bumpers / cushions to which kept them from damaging my boat. Mine was one of the few remaining on the dock after the storm.
When the storm was over many boats were piled up at the end of the canal some 60 yards from me.
My next door neighbor had a nice Boston Whaler that (I had advised him to get more new lines previously but he was too value conscious) had hung onto the dock by one flimsy line that had not broken and was 90 degrees to the dock and he was on it holding a piling yelling for help. The same dude had thrown away several thousand dollars in meats (twice after storms) he kept in a large freezer as overflow from his business because he was too "value conscious" to get a generator. He felt I should run a line from my genset to his house because my genset was so big
Anyway, I got my boat hook, pulled it in and secured it. He sold the boat, brought the freezer back to his business and got a 2000 watt generator that he thought might be sufficient to keep him comfy after a storm.
A few things came out of this.
1. Far too many people rely on too few lines to secure their boats.
2. Way too many people wait till the last minute (if ever) to replace old, faded, frayed lines.
3. People gladly pay insurance to a company but too often don't buy products to keep their valuables safe.
OP, I'm glad your boat was found and hopefully you will get your stuff back.