If you want to go, do it! I started taking my granddaughter when she was 2.5 years old. Several of our trips were just the two of us for all or some portion of the stay. My granddaughter got 100% of my attention on these trips and it was completely magical, whether she was big enough for all the rides or not. My very favorite memory is when we were taking a break in the shade behind Dumbo one day, and Peter Pan came running through. He started a game of chase with her, and other children joined in. She kept coming back and hiding behind me, and Peter Pan would run around shouting her name and asking everyone around "Has anyone seen Makenzey?" It was priceless. One time, she was dressed as the Cheshire Cat and the Hatter & Alice took her by the hands and walked her all around. They ended up at the wishing well where the Hatter asked her if she wanted to take a swim! We still take trips together; just her and I, one time we brought her best friend along, and sometimes the entire family comes. But those lazy days when she was so small, and we spent hours in the Redwood Creek Challenge Trail, or on Tom Sawyer Island, or meeting EVERY princess, or hearing her singing in her tiny voice on Small World... those are the most precious to me. Being alone in the parks with her, with my attention 100% on her, afforded me some memories I'm sure I would have missed if even one other person was along. We travel from northern California, so it's not an inexpensive trip - but so worth it.