We have planned our first Disney cruise in March 2010. We are looking at the Atlantis Beach Day or the Blue Lagoon Beach Day as a possible excursion while we are at Nassau. Is it worth booking this beach day or are there other public beaches that you could access via taxi or water taxi? Would anyone recommend one over the other (Atlantis Beach Day or Blue Lagoon Beach Day)? Any other ideas for Nassau? We will be traveling with two kids - ages 8 and 5.