I went for the first time last year, ran into some friends, snapped a photo of St. Roy, and came home with some new toys.
The tailgating starts around 6:00 a.m. and the doors open at 9:00 for the dealers' show.
The second auction is the Brown International Antique Tool Auction on March 26 and 27. The dealers' sale is Friday and the actual auction is Saturday. It's a good sale, but the spring show is typically not quite as packed with vendors as the fall show. Last year, vendors started closing up early and many were gone by 5:00. So if you plan to go, go early.