However, I'm quite suspicious of dead lifting 125lbs into a dinghy. I'm trying to envision my wife, just lying on the dock, while I am sitting in the dinghy and trying to pick her up and put her aboard. Not quite the same, but that would be hard. Now I'm trying to imagine getting it off the sailboat at anchor.
I think for the most part you could use the boom as a make shift crane, with a little ingenuity I think this could be done easily enough.
The only scenario I can see that it might be an issue is if the boat is tied up along side another. Then it may be a taxi ride instead.
Naturally, you're going to have to wait for pipes to cool down when you return as well.