For camping, man pack, use an all-steel USGI tri-fold or a good knock-off is pretty standard. The 1941 equivalent, a longer wooden handle with blade and pick that are locked into various positions with a large nut are about as good, a little less compact when folded.

A D-handle spade is bulkier but a lot easier to use. The compact military/camping shovels are pretty miserable, downright back breaking, if you dig deep or for very long.

The full length shovels, roughly 46", are far more efficient and ergonomic moving dirt. Digging large holes is pretty tiring with full-sized equipment. The only reason the military can get by with dinky shovels is that faced with death by gunfire, and a lack of other options, people get by with what they have. Used to be the GI steel pot helmet made a functional entrenching tool, and wash basin and cook pot and stake driving hammer, in a pinch but they got rid of them in favor of plastic units. Sigh.

If a lot of digging is part of your plan, perhaps a contingency for rescue after an avalanche or mudslide, full-sized shovels are much more of an advantage than the compact versions. Glass reinforced plastic handles are stronger and don't rot or get eaten by bugs in storage but they are often a bit heavier and almost always more expensive than the wooden handle version.

I have a tri-fold as part of an urban rescue kit. Along with a saw, hatchet, pry bar, wrench, gloves, goggles, flashlight (rated for explosive atmospheres), rope, and few smaller items. All in a duffel bag with a stout shoulder strap.