Have it "disassembled" and boxed at your favorite bike shop.
Sometimes they'll handle the shipping too.
On the end /beginning of several popular touring routes, the local shop does that often.
Boxing, dismantling and packing, labor is charged, and the free packing materials,
saved from new bikes received, is used..
a labor savings of doing it yourself and boxing it, with provided materials
is also possible.
then credit card account is billed for actual UPS charges. they pick it up.