There's a firewood place here in NW PA that lets you back right up to the pile and load your own wood - take only the pieces you like, toss aside any undesirable species / heavy wet logs / etc, pack it and stack it as tight as you like. Then you pull over to the office, and they measure the size of your pile, and charge $1 a cubic foot. The math always goes something like this. "Let's see, that's about six feet wide, and about eight feet long, so that's forty-eight, and 18" high, a little extra on top to account for the wheel wells, ok, let's see, that comes out to... let's call it $60." I've never had any reason to argue.