DONT PANIC
i live in Ashford (Junction 9 & 10) you will be kicked of at Junction 11 going coastbound and allowed to re-join at Junction 12 then carry on as normal
our friends from the local constabulary are there to help :-D
my wife works in Dover and does this trip 3 days a week, stack or no stack - it might add a few minutes onto your journey
but
DONT PANIC :whistle: