What is the name of that flute Phillip - looks like a "snake charmers" flute (Eric take notice). Virtually every culture seem to have there own version, and it is hard to keep track of them. "Tin" flutes such as the Irish whistle are pretty good choices, and cheap, light, virtually indestructible are easy to learn to play. But as I wrote some year back on here I think, even the mellow Native American flute which I can play a bit sounds like a freight train in my ears after a few days solo, so I don't even try anymore. I think it might be different with more people around.
The ones I took, when I took them, were DIY instruments made out of PVC (Shachuhachi and NA flute) so they were cheap, waterproof, and unbreakable. Can even be chucked at a bear in a pinch.
Top to Bottom: Clarks Irish Whistle (a classic), plastic NA flute (bought), PVC Shakuhachi (made), Bamboo 1.4 Shakuhachi (made), last row animal calls I have used to mess with critters, owl call, hawk call, wounded rabbit call makes the Coyotes (the kind with fur) and foxes (not the kind you probably wish) come running for a photo.
If only there were a wounded plant call maybe Bob Gross could get more pictures of bighorn sheep in the mountains.
Apropos if wilderness travel and multi-purposing, the rumon/legend is that in addition to aesthetics the heavy root end of the traditional (and heavy) Japanese Shakuhachi was usable by the traveling monks who played them as a club for protection.