Oh my God...this actually happened to me once. My husband and I went to Kentucky one summer (I think 2017?) because my family was having a family reunion. I have a HUGE family (my great grandmother had 18 kids!!) and I don't know a lot of them, either, mostly because my parents moved away from Kentucky when they got married. My husband and I stayed in a hotel for the first night, because we got in late and didn't want to interrupt anyone by coming into their home in the wee hours of the morning. We decided to just go on our own to the reunion, which was out in a rural area where one of my cousins lives. We saw a bunch of balloons tied to the mailbox by the side of the road and thought "YAY! We made it!"........we started saying hello to everyone and I thought it was strange that I didn't recognize ANYBODY. About 45 minutes later, I got a text from my great aunt asking where we were. I joyfully texted back "I'm here - where are you?"........
Turns out we needed to go a little further down the road. We were at someone's house we didn't even know! Oh my God, it was so embarrassing. We tried to leave and be stealth about it when someone came up to us and introduced themselves and it turned out to be the owner. We explained what had happened, and we had a great laugh! He was so nice to us and he knew my cousin very well, so everything was o.k. But I was so embarrassed!