The advice I would give: It is easy to get a TPK with a party in this. A party that doesn't use sound tactics will get slaughtered. I ran this a few months ago before Saltmarsh was released and the party boxed themselves in and tried to take on all of the smugglers at once without bottlenecking them. I even left out the assassin because I figured it would be too much. So I had the party enslaved and shipped out as a result of the TPK. Seriously I have two players with serious hero complexes. The goliath cleric ran into the middle of 4 smugglers thinking he could wipe the floor with them. Oh and the party was 3rd level at the time, figured out there were smugglers, and had an approximate count of them.