We have gone the last 2 years. Leaving from honeymoon bay (water island ST) head toward sail rock and toward Dewey to check in. It is straight down wind and will take about 4 - 5 hrs. The entrance is well marked as you do a dogleg in. You must anchor in Dewey and can clear customs (US vessel and crew 787-729-6840). Can provision there but no fuel or water. The Dinghy Dock is a good restaurant. After clearing in we like to head north toward Puerto Manglar where typically you will be the only boat. I do not trust the moorings but anchoring is good in about 16 - 20 ft. from there Culebrita is a short sail (motor). Once again I would avoid the mooring and anchor in sand. This is the idyllic caribbean beach. Do not go on a weekend as the PR navy will take over. Donald street has a cruising guide that is helpful. Having said that, while it is wonderful when you are there, the trip back is tough. We found that we liked Honeymoon bay so much that we probably will not go back to Culebra.