We were there for 10 nights in October last year. The crowds were somewhat heavy and significantly more so on the Columbus day holiday weekend and weekend after but not overwhelming like prime holidays or mid-summer crowds. Epcot in latter part of afternoon and evening at times had some long lines at the numerous wine kiosks. However, even there for the most part it was manageable and if you go to the hidden wine cellar there was almost no one there (they turned the closed down Wonders of Life Pavilion into a large hall with lots of wine stands, some food stands, and have some presentations and apparently most don't realize it is actually open).