Delivering RVs as a contract driver, WA resident...

Several times that I've been back and forth across Washington, I see the same trucks hauling the same trailers, doing dealer trades on cars, or long distance deliveries from a dealer in Idaho. That looks like a decent gig too, and I've wanted to ask them a few questions, but as luck would have it we never end up at the same rest area. They stop at one, and I pass by it and see them there. I stop at the next one, they get ahead of me, and it continues.