We are going to be travelling from Vancouver to Yellowstone and as far as a I can make out Blaine is where the border crossing is. We will probably be travelling over the border mid to late morning on 25th may this year, and wonder how busy the crossing is likely to be. We are trying to get a rough estimate so that we can work out where we ought to be thinking of staying overnight. We are travelling on the 99 in British Columbia, then onto the I5 south in Washington. Or is there a better option. This is the route that google maps gives for the journey. We are british citizens so will have to go through the whole visa waiver green form business.