I guess the trite phase about third time being lucky may be appropriate here
For the Tortuga event in 2009 I wanted to make sure the puzzle was accessible and fun. I wanted as many people as possible to have a go but it be difficult enough to make the real puzzle enthusiasts still enjoy it. I opted for a hunt for buried treasure (of sorts).
The puzzle was given out early as usual but only two weeks before the event. It came in two parts. A reference map of the Caribbean and a letter. The map was painted on a large board so it could be available for people too peruse on the day (It was also little clearer in the flesh too which helped)
This is probably one of my favourite Tortuga puzzles. It had a excellent balance of fun and challenge. Plus, having lots of pirates looking at the map in the middle of a tavern table, tracing out ideas while trying not to give away what they're doing or thinking made for some great moments.