I go to this event every year and it's become my favorite Halloween tradition. Amazing music and one of the biggest costume contests in the state. Lots of awesome vendors and Amazing fire show. It is a old traditional celebration of all hallows eve and the end of harvest season.
It's a bit pricey but the money does go to charity and helps pay the wonderful talents and bands that perform for the guests. Calaveras County fair grounds is a great place for an event like this. I would rather help a small group like these than pay hundreds of thousands to big companies like Disney anyday. If you like renaissance fairs and Halloween it is a perfect blend of both worlds. A night of fantasy and enchantment and mysterious history.