They're not and haven't been for a while. Most people seem to be forgoing the cost of an $ILL and opting to snag a BG instead. Even in December, I would expect you should be able to get an $ILL so long as they haven't switched the ride from VQ to standby. If they do make the switch before your trip, then all bets are off, and you would most likely be in a scenario where getting an $ILL after park open could be a dicey proposition.