We have been at WDW for NYE twice and will be there for this NYE 2008-9. First, make sure you make your plans early and call for your adr 180 days out, especially for one of the favorite places. We avoided MK on both occasions because you need to get there by 10am and plan on staying there until the end..no park hopping option here or you may not bet back in. It closed to all guests(including resort guests both years..even if you have adr, if they hit the max capacity, you WILL NOT be allowed entry into the park. mgm and epcot fair better and we were able to park hop. 2003-4 we started at mgm and then hit epcot at 4pm (via IG) and had adr for Teppanyaki for 8:00pm. It was crazy crowed, but fun..it started to pour so it put a damper on the outdoor venues. We had to wait 45 minutes for our adr in Japan, after we ate we left via boat to BW and DH went on to mgm and got our car and picked us up at BW and headed back to OKW, saw some of fireowrks at DTD from our room at OKW. 2004-5 We chose to stay at mgm all day and had adr at BD for 8:45. We were able to tour (with FP) fairly well, enjoyed the outdoor venues of music and even hit the last Fantasmic and then took boat back to Swan and watched the Fireworks at MGM from our room and even caught some of Illuminations fireworks from the S&D dock.
Connears