Escape from LeChuck's fortress without using grog?
Solution 1:
I have to start the answer with a facepalm.
It appears that in the easy mode you can just talk to Wally, and he will somehow get you down there.
How could we not try this!
For reference:
- https://gamefaqs.gamespot.com/pc/562680-monkey-island-2-lechucks-revenge/faqs/6447