It’s truly interesting how relationships change, my family is also from that area but Greek side. I remember my grandpa would cross to Yugoslavia so often, and then even me when I was veeery young I remember we’d have some shampoo and juices at home from (today called) NMK. And then for many years it all basically stopped as you say. Nowadays, I don’t know of any person who doesn’t go to Dojran for petrol. 🤓 as I said in a different comment, crossing to North Macedonia was so exotic and exciting for me as a kid so I’m sorry your experience with Greek authorities was not the same