I don't carry a pipe around very much, but when I do, I usually keep it in my hand and park it somewhere that seems safe, in the car cup holder or even on an inconspicuous window ledge going into a store. I have a nice leather pipe case that will carry churchwardens and shorter pipes. For travel, I resort to an inexpensive nylon shaving bag that looks mundane and therefore not tempting theft; it holds several pipes, a few blends, pipe cleaners, and a pipe tool. I've never done it with a pipe, but I once buried a pocket knife in a garden bed to go through security and claimed it later. Worked fine.