It's just a short drive to Wounded Knee; that would make it a convenient tourist stop all its own. "On your way to Wounded Knee, stop and stay at the haunted bed and breakfast in Swett!"
I would caution against using a massacre in advertising particularly while implying a haunting.
On the contrary, play it up. Stuff like the haunted house sleepaway camps, where they can drag you from your tents, are becoming quite popular.
I think I would define it as more of a hamlet, if that.