Just now (Tues evening) watched the local weather forecasts from ATL channels 11 and 46 and BOTH agree that the rain on Friday should be passing by the end of the evening on Friday and clearing for SAT morning at the Event!
Morning start at around 40 degrees and and by afternoon Mid- 50's ... not too bad for early DEC in this area!
I would make your plans to come ... the weather will be cool ... but a great Swap Meet outlook! Cheers ! CCR Dave