RCI - on board packages, drinks, spa, etc?

[Tyre Smoke]

Hi all,

Booked a Caribbean cruise for Christmas and New Year, so a bit of time to go, but was wondering about how much money I need to put aside. Never cruised before and really looking forward to it.

The travel agent was quite helpful saying that rather than pre-book via the RCI website, it's always cheaper once you are on board because they always give you a discount. Thing is, how much is a) the alcohol package and b)the soft drinks package? Just a rough idea of how much I should set aside? We are effectively doing two cruises back to back, so presumably we will need to buy two packages?

Any pointers would be great from anyone who has been with RCI.