We went to Disney World for my 5 yr old's birthday. My son was about 10 1/2 months when we went. Not sure if you're nursing but they do have a nursing station (possibly more) at the Disney/Universal parks. My son did pretty well traveling but he doesn't sleep real well in the stroller. I brought a long a front/back carrier for the times he just got restless. He loved the water areas but we did go in Sept so, it was very hot/humid then. We did go on a different vacation (extended my husband's work trip) in January and my son who was 2 1/2 months old did pretty well but the carrier was what helped the most. With kids you just have to have lots of pit stops along the way - don't plan too much. Unfortunately, at their age, I don't think they'll get much out of a vacation. Going to the local zoo or a museum would have the same effect as a trip. Altho they enjoy the plane, beach, warmer weather - they just can't grasp where they are and that it's a vacation. For us, both trips we did bring along our parents - my parents in Jan and my in-laws in Sept. It was nice to have extra hands and have babysitters for a couple nights to ourselves. Otherwise, if you're wanting to get the most for your money - I'd say, leave the kids with the grandparents or other relatives and have a nice trip alone. It will actually feel like a relaxing vacation for you then. IF you're nursing . . . I remember going on my first trip child-free when my dtr was 9 months and it worked out just fine to pump.