USK, that's kind of a hard one. I think this "class" is closer to what a regular grunt might need, than a backwoodsman. More likely to open a can than skin a deer. I EDC a Buck 501 and Leatherman Blast, (it honestly never occurred to me to think of them as burglary tools

) they do just fine, but self-defense isn't a big concern for me. Likewise, if I wanted to be able to bash my into/out of stuff, I'd want a lot more blade, although you can thunk pretty hard with the butt of a Leatherman sticking out of your fist; diddly for prying though. The USAF knife looks like a good candidate to me, not a super slicer but sharp-ish and stout as the dickens. Go any bigger than that and we're back into medium knife/big knife/hatchet etc and I've been around that block enough lately.
I don't think I can legally carry any more than a 4" on the street, so I'm thinking about this more in terms of a daypack/VSK, I guess. Sure not going to walk around with my Trailmaster tucked under my t-shirt everyday.