You can try a travel humidor...

http://www.cigarbid.com/auction/lot.cfm?lotID=339370

http://www.cigarbid.com/auction/lot.cfm?lotID=339361

http://www.famous-smoke.com/cigars/s...cfm/inum/15922

or like BKC mentioned get a rectangular tupperwear box with some kind of cushioning. If you're going for an extended period of time, I'd go to your tobacconist and pick up a drymistat or water pillow.