That's how old mine are! 14,9 and 8, but I have 2 boys and a girl.
Wow! I never thought I would get 8 pages of opinions!

My oldest never has to babysit the younger ones, because I usually never go anywhere without them, and if I do he usually stays at home while the other 2 go to their grandparents who live around the corner. But at Disney, yes, he might have to sit with one while I go on a ride with another. He is not interested in riding any rides. He doesnt like coasters, so its more likely I would be riding the "big kid" thrill rides with the 8 year old who will ride anything. I have tried to include him in planning, we might even go to Universal, but he is not interested in going there either. I asked him if there was anywhere he wanted to go and he said no, he doesnt want to go anywhere! It's not just Disney, we do a lot of field trips since we homeschool, and he never wants to go anywhere. His idea of a good time is fishing, riding dirt bikes, and watching Nascar, and if it is anything other than that he doesnt want to do it!