We've done that 2nd week in Dec twice, back in 2017 we tried to do the first week of Dec but since we were renting DVC points and that week coincided with the annual meeting we couldn't find any availability for where we wanted to stay that week, but the 2nd week had availability so we were good. As far as crowds, never had a single issue during those times when we went before. This year we will be there the 1st week of Dec, immediately after Thanksgiving but I'm not anticipating crowd issues due to lower attendance due to COVID. Honestly this if my favorite time to visit WDW, lower crowds (for WDW normally), great weather, holiday decorations, all good!