I've seen people bring firewood from as far away as Georgia to Big Bend National Park (which does not allow any wood fires - ever) in west Texas.
I've seen people from Colorado show up at Davis Mountains State Park, outside Fort Davis in west Texas with firewood from their homes.
I know some folks from the Dallas area who always carry local east Texas firewood where ever they go - from east coast to west coast.
I can understand a couple sticks for a first night fire - but I can't understand folks who carry several hundred pounds of wood. The general reason they give is their wood is 'cheap' and the folks at/ near campgrounds charge too much for wood.
I carry one of two 'fire logs' - the commercial ones - so I can get a fire going without having to hunt up firewood on the first night.