Do they sell firewood if they do how much is it and where do you get it

Yes park has wood $6. Per bundle at campstore.

Walmart

I don't know. I was there for my nieces wedding.

It is also available near gate to campground. Just ask gate keeper as you enter.

Not sure if the park itself sells firewood but there multiple places around the area that do. Or you can bring in your own as long as it's seasoned and from inside the state of Indiana. There are others rules regarding firewood but those are the ones I can remember without getting out the brochure.