I have done New Years Eve 2 times at Disney
97-98 we did it at MGM. Not bad. We caught huey lewis and the news in concert. we were still able to walk around and ride a few things. this was before rock n rollercoaster and fantasmick were there. had a big party in the big square and hollywood ave. lots of loud music, confette and fireworks.
99-00 was CRAZY...at 7:30am, all 4 parks were closed. we had to go the back way, park at swan, since they dont check id to park, and walk to world showcase entrance. the line went all the way back to the ship of SAb pool. took about an hour.
it was so busy, they had a cast member letting poeople inat a side gate. just show your park hopper and get in, never got swiped. so we basically got that day for free.
did not do anything all day. just sat, and sat, and sat in between shoulder rubs in a few shops here and there.
we have not been back for thanksgiving or christmas since.