The Shell station is in Manitoba.

If you haven't been up there before, as you get closer to the Angle there is a clearly marked line cut through the woods. That line is the international boundary where you actually re-enter the US. There occassionally may be customs agents there - either US or Canadian or both. They sometimes have sniffer dogs, so leave the whacky stuff at home.

After that you come to Jim's Corner where there is a remote reporting phone. You will need to call the US customs from there (press the American flag on the phone). The agent that answers may or may not ask if you aquired ANYTHING in Canada.

Another important thing about the RABC - it applies only to people, not to goods, which in your example would include alcohol. I was politely chastised for this once, he let me keep it and go through, but informed me he could have confiscated it. So, if your goal is to get through as smoothly as possible you would likely not want to buy any in Canada.

As noted earlier, there are legal places to buy it at the Angle.

I asked a guy if he ever went golfing. He said he used to, but it wasn't expensive enough so he started fishing.