We were at the Fort for 2 weeks, left 11/1. Had a great time, but I will not stay for Halloween night again. It got very crowded on the 30th and 31st, and the next morning we had to pickup broken beer bottles from our site, not very magical. Not sure why they threw them on the ground when the trash can was only steps away.
The rules say one car per site but in our loop (300) starting on the 30th a majority of sites had 2 and some 3 cars which I think contributed to the congestion. I was surprised that nobody from Disney seemed to come around and ask them to take the second car to the overflow.
Don't get me wrong I love FW and other than those 2 nights it was wonderful. We will be back in December but I am going to try and get a different loop.