So I'm thinking of adapting this to 5e during an upcoming beach trip, we'll just play it all week long and finish it up. Any suggestions or advice from people who have run or played it? It's supposed to be very good and widely regarded as one of the better D&D modules.
Find a copy of the 3.5 Dungeon Master's Guide II, it has a full writeup of Saltmarsh full of plot hooks. Its set somewhat after U1-3, but enough of its portable back. Seriously, its one of the best town writeups I've ever seen.