Have you ever been to WDW before? The reason I ask is this. Thanksgiving is one of the busiest times of the year. We have been 3 times before as a family. If we didn't have that prior experience I think we would have felt very overwhelmed... Our observations from Thanksgiving '04
Monday wasn't too bad compared to later in the week, Tuesday the same, Wednesday at MGM, a definate change...more crowded,"packed" is a good word...Thursday at AK also crowded but not as bad as MGM...(we purposely waited to go to AK till Thurs) Friday at Epcot crowded, World SHowcase very crowded... Afternoons in general were the most crowded. But we accomplished alot considering...we booked our meals in advance and many restaurants were turning people away, there was no availability. We used FP to the best possible advantage... and we kept in mind that we had been before and we'd be comming back again...so anything we missed we'd see the next time. So, I guess what I'm saying is, it's doable. With planning and a good mindset. But, there's no getting around it, it's crowded!
By the way, the week after is wonderful...we did that in '97...and if you have any questions I'll be glad to help...