You will have to put up with a lot of extra traffic at that time. The road will be jam pak full with the Greypower Nomads and their slow traffic towing all of that stuff that they cart around whenever they go anywhere, and I guess that there will also be a lot of congestion on the NWCH from holiday traffic as well as the unusually heavy amount of big road trains, that make travelling on that road vary tedious.
Don't ask me how I know,
Cheers, Winston66