For a general all-around camp knife, Ka-Bar's Becker BK7 is a hard worker and extremely tough (buy the micarta scales though, the originals aren't great). As others have mentioned, the Mora Companion is an excellent entry level knife, but less suited for very rough work. For something in between, I'd highly recommend the Ka-Bar Jarosz fixed. Nice multi-purpose profile, and suitable for both small and large jobs