1 more thought- If you decide to go, maybe 6 nights is too much with a 3.5 yr old. What about a 4 night trip? Depending on where you are flying/driving from, you could get 2 full MK days, an Epcot day and either an AK or DHS day which would be plenty for a 3.5 yr old. Do a few character meals and that would be great trip and may save you some money too. Then you could back when DD was 5 or 6 and do a 7 night trip and bring the twins too!