For some reason I couldn't catch up with any southbound trains in Laurel, which is why I ended up hitching out of there and landing on that worthless exit! As for the area between Billings and Rapid City, I'd more or less have to agree, though I did score a dream ride all the way home to Omaha from a trucker in Gillette, WY.
I've never really trolled truck stops for rides; always have hung out on the ramp. What do y'all usually do when seeking rides at a truck stop? Fly a sign with your destination? Strike up conversations with random truckers? That Flying J you're talking about gave me the boot for simply sitting on the grass eating my lunch. The guy was polite about it, but it kinda caught me off guard as I wasn't really actively soliciting rides or begging for food/money at all.
Where were you waiting for SB's?
I usually make a sign and hold it up while walking in front of all the trucks or ask a trucker to use his radio and use it to ask the other truckers for a ride. Must truckers won't pick up hitchers because of issues with the contract they have with their company, but as you know, some do and it's usually a long ride which makes it worth the try.
I think I got picked up in Gillete from a trucker going to Omaha once, was it a black guy from the south?