fleming: And even for options that are different prices based on the number of days of the tickets, you have to pay based on the number of days of the ticket, not the number of days LEFT on the ticket. So you don't save any money by delaying adding something if you know you're going to add it.
petesimac: The water parks and more option makes it like you have two tickets in one.
The main ticket (base) is for the 4 major theme parks (MK, AK, Studios, Epcot). If you don't have hopping or no expiration, you have entry to any one park on any day, up to the number of entries that you purchased, for 14 days from the first day you used the ticket. So if you bought a 3 day ticket, you can use it on October 1st, October 3rd, and October 13th (I'm not exactly sure how the 14 days is counted, so I'm trying to be safe here.
SEPARATELY, the water parks & more option adds entries to MINOR parks - the two water parks, Disney Quest, ESPN Wide Worls of Sports or 9 holes at Oak Trail. So you could use these 3 entries on October 4, October 6, and October 11th, if that's what you wanted.
OR if you bought a 10 day ticket, you could go to a Major theme park AND a minor park every day for 10 days, because they are separate.
If you add park hopping, that only applies to the major theme park half of the ticket; if you want to go to Blizzard Beach and then Disney Quest on the same day, you CAN, but that would take two entries.
If you don't add park hopping, you can NOT use two entries of your major theme park ticket on the same day to go to MK in the morning and finish out the day at Epcot.
Remember, you're buying ENTRIES to parks, not calendar days.