We were there during Jersey week last year because our non-Jersey district also has a lot of that week off. CMs told us it was unusually warm, but we wore shorts and only had to throw on a light jacket in the early morning and late evening. We had one day that rained on and off but gorgeous weather the rest of the week. Yes, it's crowded, but I think Disney always is. It seemed less crowded than our one spring break trip. Crowds were manageable most days. (The one exception was Epcot on a night that MK closed at 4 pm, but that won't be happening during Jersey week this year.) If you've been during crowded times before, then you probably already know the tricks. The one thing you may need to figure in is the RunDisney event the weekend of 11/1-11/3. I don't know which races are which days and what parks are affected, but there may be morning traffic and bus delays getting to the parks. We didn't have any delays the Sunday of the race weekend last year taking a bus to MK, but we left ourselves a lot of extra time because people here had warned us about it. There's also a Run Disney party on Sunday night in Epcot, but I don't know how that affects crowd levels. (Like the After Hours events, it's a ticketed event after closing but people with a party ticket can enter the park before closing time.)
