We've taken a side trip each of our last two years during our visit to WDW. It's only about a 45 minute drive door to door and the park is very do-able in one day, provided you ge tthere right at park opening and don't intend to spend a lot of time at the shows or Cypress Gardens portion of the park. Our DS8 loves it there so much, we're staying at the Legoland hotel for a few nights before we arrive at the Fort. If you have kids under 12ish and have adults with any passing interest in Legos, it's well worth your while (I'm not even a huge fan of Legos like DH & DS, but I even find the models fascinating).