Might be a different idea, but kind of a tough sell. You would obviously be looking to get paid so the haunts would have to pay to have you perform correct?
Unless you are a name band with a following it would be more cost effective just to use local bands. We get aproached by several bands every season all wanting to perform for free, just for the exposure.
The Insane Clown Posse did a similar style tour a few years ago. They were looking at the exposure and did not even charge the haunts.
Seems like you're in the "dog chasing its tail" situation...
The Band is looking for exposure and needs to cover expenses and be reimbursed...
The Haunts need entertainment with built in draw to justify any expenditures.