Haven't seen anything about this on here, but happy to be corrected!
Just a heads up on major roadworks through Dover on A20 to the port in addition to the HGVs being held further back. Long term until Feb 2017 I think it said.
Don't forget to leave a review of the French and other European campsites you have visited!
I drive along that section each week, the roadworks are along the road between the eastern and western docks, and the westbound section is down to one lane. I have not been held up yet though I could see that it might be a small problem when lots of lorries are coming off the ferries and heading to the A20.