Here there is no good "shipping center" for Fed-x or the big brown truck. So I ship exclusively through USPS.
Many rural locations, Fed-x will just put the package in the mail as it is cheaper than driving their truck around out in the country.
On a side note, My dog Punkin, "Hates" the big brown truck and it's driver for some reason. I gave him permission to just throw my stuff into the yard if I am not there to get her in the house. It's kinda funny, cause that is the only vehicle she act's that way to.