If you can handle crowds, then don't let people scare you. We have been at MK on 12/30, Epcot on NYE, and all of the parks during Spring Break, which has some 9 or 10 days. There were people and lines, but rarely was it wall-to-wall people everywhere all day. I would have noticed, because I'm short. The hub does get to be wall-to-wall for the fireworks, but generally there is some room to breathe. I actually enjoy the crowds some times. It forces you to stop and smell the roses. You do attractions you never would do, and you look at things that you never noticed before. On 12/30 at MK, we discovered that there is the most beautiful view of Tomorrowland from the Swiss Family Treehouse at night. Things like that are sort of priceless.