how to choose a fair

Hi everyone.

This is my first post. I hope you can share your wisdom with me. I've read some face painters make really good $$ working at fairs and festivals. I've only done a couple and have had some bad experiences (like nobody showed up the whole day). Or ended up being in a really poor area (that was my own fault for not google it before signing up). And the best fair i had I only made $50 profit.

I would like to know what am i doing wrong?