My family and I will be cruising on the Dream for the first time in October. Planning on booking the Blue Lagoon Dolphin encounter and would like to spend he remainder of the day on Blue Lagoon beach. Does anyone know how much it is to play on the inflatables in the water there? Also, do they accept cash? Feel more comfortable knowing prices ahead of time so I can budget appropriately. Anything else to see or do on Blue Lagoon Beach? Also, as a first time cruiser, how fast does the dolphin encounter book up? Thanks for your help!