>I think it is a good idea to get a pass to 4 Disney parks (Disneyworld, Epcot, MGM, Animal Kingdom). It is cheaper and passes may be for 3 days (thats what we took) or more.

FYI, the multi-day passes have no expiration date (or didn't the last time I was there). So if you only plan on spending 1 or 2 days, get the pass anyways so you can go to all the parks. Then you can give or sell the remaining days to someone else or save for another trip. :)