Do they sell firewood at the office or do we need to bring wood with us?

Whichever Campground Host is on duty (whether in the office or out cleaning sites), they'll have the key to sell firewood to campers... there's a sign saying, "Firewood Sold between 4-6pm" but they'll always respond to a nicely spoken request. Oh and firewood is a cash only purchase.

I believe they do sell it there, of course you have to get it when someone is available to unlock it

They sell firewood at the office.