Yup, tis true. Lately, (at least for the past 5 years) the second week in November has been very, very busy, with sold out rooms. The Food and Wine Festival is going on at Epcot, it's also the "soap" weekend at MGM, and it's a week off for schools in Jersey. There are other events going on also at that time at Disney, so it makes for a very packed place--but not necessarily in the parks--unless you go to MGM during the soaps weekend. Since you already have your reservations, I wouldn't worry. You may run into problems trying to get priority seatings, etc. Just go with a positive attitude, and you'll be fine.