We finally made it back to the States!
Thankfully, the border agent didn’t make us endure a long investigation on when we crossed the border. He recognized we were having trouble (blown tires, vac pump issues, weak brakes, oil pressure) and gave us some advice. He suggested we go to Malta Montana and get some spare tires there.
This shop was able to get us a spare used tire same day. That was crucial because we weren’t about to hang out in remote Montana waiting for a low-quality spare tire.
Also, another shop was able to charge our AC after we found that the low-side nozzle was leaking. Glenn and I replaced the valve, and then went to the shop. The guy was really friendly and helped us out right away, since we were traveling through.
At the end of the day, we stopped at the nearby Great Plains Dinosaur Museum which was small, but good.