Hi Debbbb1, The only boats I remember were the bigger snorkel tour boats from Fajardo,PR. doing days trips, they come in slow and anchor off the reef. Lots of good coral and a fair amount of fish. My uw camera screwed up, so no pics, but DaveC has some good photos from Culebra to give you an idea. The best spots we found were at Carlos Rosario and Melones. We flew to Culebra from Vieques and took the ferry back to Fajardo.
We are also starting to plan our next trip, Thailand was on the top of list, but we have decided to go back to PR and then to St. Thomas, St. John, Tortola, Virgin Gorda and some other small islands on day trips
You might want to check a thread I started titled "best shore snorkeling in world"