I resupplied as I went; never sending myself any food. I did, however, have a bounce boxed filled with guide book sections and nutritional supplements that I mailed along about every 500 miles.
I liked the challenge of putting together a resupply from what I could find in the little stores and the freedom from trying to make post office deadlines.
Having to get to the next post office before it closes for the weekend can be a good motivator for getting a lot of miles in, but it would get old if I had to do it too often. I really hate having to get anything in the mail; it always thwarts my freedom.
Resupply at the big stores was a real treat and I would walk out of town with multi-grain tortillas, deli cheese and meat, fresh fruit and veggies, dark chocolate, Crystal Light energy drink, and my water bottles filled with Odowalla juices.