I have done Dis with twins at 11 months(and twice when they were 2, and we will go in July when they are 3), with 3 other kids in tow. It is work, but you can have fun. Just take it slow, you won't have to worry about riding the bigger rides , but you might end up like me, sitting with the buggy in a shady spot, while dh and kids run around and ride. A big hassle is getting on and off the bus with buggy, bag, babies and other child, but we always use Dis busses to get to the parks. Just be prepared, have everything ready and try to avoid the really crowded times to board(eary in the morning and towards the close of the parks). Bring snacks in baggies and little water bottles that you can fill from the big ones they sell at the parks(easier for the kids to hold). I always bring crib sheets and a blanket from home to make the babies more comfortable in the pack and plays that the hotels provide. Look around on the boards, there are lots of threads about babies and twins.