On the east coast, so I can only guess that the holiday had the biggest effect on attendance.
I've sold at local TCA shows only. There always seems to be a good amount of people walking into those with money in their pockets they don't intend to go home with. I've been selling for estate liquidations mostly, and only a few items from my personal collection, so I can price things very aggressively.
I've walked out of there with $2000 in my pocket while the folks beside me didn't make back the cost of their table. Why?
1. I see a lot of overpriced stuff. Things you could get on ebay for less than half of the asking price at the show.
2. Then there's the tables filled with dirty, rusty, low grade items. Maybe they sold at one time, but now, you've got to clean them and get them in shape before people will pay anything above a "parts" price.
3. And this is a personal pet peeve, I've witnessed vendors showing up just shortly before the general public and spend the first hour of the meet still unpacking boxes. It seems most of the transactions happen in the first 90 minutes at the TCA shows.
My conclusion - you have to stay well tuned to the current market prices. Follow ebay and the forums to see what is selling, and at what prices. Be ready with items that look good. And, be ready to take a fair amount home even on a great day. The buyers really change from one show to another.