HP, I've been packing my pipes on backpacking and canoe/pack trips for years. If you're day hiking, weight isn't nearly the concern, but when you're going in for a week or more with no resupply, every fraction of an ounce becomes important. For either, I always take my older, less valuable pipes, as accidents and losses can happen. I once had my best Danish Freehand gnawed to sawdust by a porcupine when I left it out over night. I also carry and use one of those spring-loaded screens that fits over the bowl to prevent and embers from blowing out.
If day hiking, I'll fill up the bowl, put the screen on, and stuff in a small ziplock and she's ready to go. If going into the woods for an extended trip, I usually carry one, light pipe and my Kirsten with two or three bowls. They can be loaded in the morning and kept in the little Tupperware containers until needed. The whole thing breaks down pretty small (that's a 5" cigar in front for reference), are easy to clean, and rugged as hell. That particular Lancer body has been used as my woods/canoe pipe for over 20 years and other than being a bit warn on the bottom, is good as new. The trick is, have Mike Brissitt carve you a custom bowl that fits perfectly in the Tupperware container.
The second pix has the Kirsten body, two bowls in containers (already filled), a mini-Bic, three pipe cleaners, and four snack-size Ziplocks each with two bowls worth of different tobaccos. So for well under 6 ounces I have ten bowls of tobacco to smoke in a package about 1 1/2" in diameter and 5" long.
But if you're not into Kirstens, any of your older, lighter pipes with the screen top will do. It does become a bit more difficult to dry them out between smokes, however, especially if you're moving every day and you hit a weeks straight rain. For a week or two, snack sized Ziplocs seem to work well for me.
Natch