Since you are transfering a weapon from one individual to another I believe that you have to use an FFL. You could ship UPS from you, to you, and they might hold it for you for a long gun. Handguns have to go FFL to FFL and the person will fill out the appropriate paperwork at the other end as I had to with my handguns. I shipped them through a FFL/UPS to Alaska.
If in Alaska, I can mail my long guns to myself from any PO, to be picked up by myself for up to 30 days.
You could also carry the firearm in a hardcase, in your bagggage through an airline. Even handguns, brought 2 back in March on Continental.
FFL sounds like a hastle but sometimes you have to jump through hoops to be legal. Unless you want a girl friend named Bubba. :grin:
More info: All firearms shipments go 2nd day air guarrenteed delivery to avoid travel through Canada. Alaskan Pilots have a problem because up here they are reuqired to carry a survivial firearm. So they have to violate Alaska regs. to comply with flying across Canada or landing there.