Thanks for all the tips!
My fair was yeaterday. Rained twice. Lots of lookers, compliments that I had nice stuff and good work, but few sales. Made my table fee back but not the sales I had hoped.
I used the cinder blocks we had lying around the house. Worked great and I was able to help out my neighbor who didn't have her tent staked.
Thankfully I had most of my stuff in bags so that helped keep it protected from the rain.
I was able to pack up before the REALLY hard rain came again. Still in the car so I'll post pics later.