I didn't think to mention that sometimes you will run across a bonehead at your local Post Office that will give you problems. I've shipped and recieved longbows (can't remember if the longest was 66" or 68") with no problems at all--but both the post offices I use have some great people there. Even shipping internationally, the restriction is usually 108"--combined length and girth.
If you run into a problem, politely ask to see the regulations. That will normally take care of it. I've heard of folks having a postal worker tell them that a bow was a firearm and couldn't be shipped, that a package was too long, etc. I sent the page and referance number in the regulations to a fellow once when his package was refused for being too large--he went back to the P.O., showed it to them, problem solved and package shipped.
We have some good local UPS workers here, but I'll still avoid them if at all possible. Seen and heard of too many packages being lost and destroyed. If you have a problem, it dang near takes an act of Congress to get it resolved. Been there, done that.
Chad