According to Brian Burke, the NHLPA has dug in their heels on being able to spend Christmas/holidays with their families. As a result, they would not be available to cross borders or begin quarantining in hub cities until December 26th or 27th. With a 14 day quarantine necessary, that means camps would not be be able to begin until January 10th or later.
Keep in mind this is but one of a number of sticking points between the league and the players, so there is still much to determine before final decisions are made.
Brian Burke @Burkie2020 just said on radio the players "have dug in on Christmas, they're not giving up Christmas with their families." If true (and I believe it) border corssing/quarantining can't begin till Dec. 26, or 27th, camps would open 14 days later.
— Kevin McGran (@kevin_mcgran) December 2, 2020