Quick update. Since I missed the boat the first time trying this, I figured I'd try it again
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This time I got the angle correct and the boat went directly over me while I was swimming, and I was not pulled up into it. I was still in the water.
So as best as I can tell this doesn't work. If no one can confirm that this works, I'll update the wiki to note that this doesn't work. If you're KoS to the dwarven female at the end of the dock as I am, invis onto the boat seems like the only way that works, although I'm guessing you could levitate onto it as well.