If you went to "Legends of the Fog" I assume you are near Aberdeen? Besides the ones Pumpkinhead listed above, you can try the haunts in Southern Pa Like Jason's Woods and Field of Screams. If you feel like venturing a little further there are a number of haunts in Delaware.
But if you are looking to volunteer you might try your local charity or community support organizations like the local volunteer fire departments, jaycees, etc.
Good luck!