Wish I lived near a campground. Money to be made right there!
Yes, 1 cubic foot per bundle. I also use a 5 gallon bucket, but mine is a bit wider than the normal bucket and I cut off the bottom. I flip it upside down, put a mesh bag over it, flip it back upright, and fill with splits. When full, I slide out the bucket, jam in more splits in the middle until it's completely full, and she's ready to go. Mesh bags are quite cheap and easy to carry, and I use silver maple for the wood.
Why 'junk wood' for bundles? Well, I figured people aren't really looking for heat wood - they want ambiance in their fireplace, or for roasting marshmallows in the back yard. Silver maple is plentiful, splits easy, dries quickly, and burns well.
I sell for $4, and the gas station and hardware store (I only have two) sell for $6.
My kids and I can crank out 40 bundles in an hour. A week of that and I have all I need for the year. This year we're trying a different technique. Everything is split and ready, but we're going to do the bundling as needed. Right now I need to go do 10 bundles for the gas station.