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Cold Steel Ultimate Hunter also another tank of a work knife would be the Spyderco Manix 2 G10 while not entirely similar the ergonomics and grip on this knife is amazing [link]
The Cold Steel Ultimate Hunter has fantastic steel, the strongest locking mechanism on a folding knife, supremely well done handles, and an excellent blade shape. This would work perfectly as a hard use/camp knife. Handle is 5" long and 0.62" thick, so it may be a little large for some to carry in the pocket, you'll have to decide that based off what you know about your husband. You may also consider the Cold Steel American Lawman, which has all of the merits of the Ultimate Hunter, but with a slightly thinner handle. In my opinion, the Ultimate Hunter looks much nicer though.