Railvan
Adventurer
I have been to the park in the past and was free to wander around the grass area, which is the large majority of the park, on both sides of the border. The park is located between the border inspection stations on I-5 for the USA and Canada. I don't know if you can park in the Canadian parking lot and go to the parking lot on the USA side to look at other vans. I'll try to get up there and see if there is a Ranger I can ask.