Remember Belize is a country. You will be in the harbor at Belize City. You will border a tender boat and take a ten to fifteen minute ride into port. In Belize check out independent companies like Coral Breezes or Ecological Tours of Belize.
We haven't been beyond the beach on Roatan so won't try to advise there.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Coral Princess - tour starts 5/31 in Fairbanks
West Bay Beach in Roatan is awesome for snorkeling! We did an excursion where we did the zip line and then they took us to West Bay Beach for snorkeling afterwards and it was a great excursion.
Our daughter did the zip line cave tubing excursion in Belize and spoke very highly about it.
Both of us were very glad we did what we did and did not do it through the cruise line, which is not as good, cost more, and was more crowded.
Both of us purchased our excursions through Shore Trips, but there are other companies also offering packages.
__________________ 47 Cruises & Counting! Favorites: Paul Gauguin to Tahiti: Uniworld River Cruises in Europe; any of the Celebrity Solstice-class ships; Holland America for 12-nights in the Baltics & Russia; RCCL for 14-night Greek Isles, Turkey, & Croatia; Holland America for 14-day Alaska cruisetour; 10-night Canada/New England cruise; 21 days in Hawaii including a 7-night NCL cruise; Oceania for 25 days in Asia; & 3 months touring Europe by train. And many days spent in all-inclusive resorts!