I understand what you mean. Sometimes it seems that it depends on the direction of the wind, even though the thermometer reads the same numbers.
I just had an idea!!
Instead of garage sales, how about swap sales for kids clothing, sports equipment and stuff like that.
My daughter gives stuff to free cycle and said it has been an amazing experience. People actually cry whenthey come to get her castoffs. She gave some cedar shutters away and the woman still emails her and said she could have neverhad them without my daughter.
Swap parties for games, books, food, all kinds of things.