I am so torn now. Crowd levels really are huge to us! The lower the better. Is it difficult to change dates if already booked? I didn't see anything about Christmas stuff so wasn't sure if it started that early, when do the party dates get released? I'll need to know all that when booking my ADR
Traditionally, MVMCPs are held 3-4 times a week starting the second week of November. I believe this year, the first party is Nov 7th. The Osborne Lights at DHS will also be starting around the same date. They run every night and are included with park entry. I believe the party dates are released around the beginning of May each year.
We went the full week before Thanksgiving week last fall- it was pretty wonderful! Very low wait times, weather was great, and most Christmas stuff was up and running.
Just be aware- the Epcot Christmas activities won't start until the day after Thanksgiving. If you have your heart set on seeing the Candlelight Processional (celebrities read the Christmas story while a choir sings traditional religious carols) or the holiday storytellers around the World Showcase, you will want to keep your December plans.
We have been to WDW several times during early/mid November and once in early January to experience the holiday atmosphere, and we have never seen the Epcot stuff. We aren't religious, so we didn't have any desire to see the CP, and we didn't feel like we missed out on anything else, either. It is up to you- either time is nice. November crowds will be lighter, but December won't be awfully crowded. Really, not a HUGE difference in wait times between a level 2 and a level 4 crowd listing.