The right answer is to quarantine, but in reality, my feelings are....
I don't worry about it in those situations. I have two neighbors with various poultry, ducks and chickens. We visit each other. The wild birds fly everywhere. Life is full of risks. I don't worry about it from certain limited people.
If I were to buy from auction or a swap it would be different. If I get some from wingstone 5 miles away where I've been regularly, I don't worry. I think I have more to worry about from all the wild birds and critters that are around. I'm trying to manage my property for wildlife, so that is the bigger risk.
Again, just my opinion. The right answer is to quarantine. It all depends on how much risk you are willing to accept. In also known to set up displays at tsc, and I don't quarantine when I return, but there aren't other birds there, either