I'm a big fan of savoury trail mix.
Get a bunch of different seeds and nuts - sunflower seeds, pine nuts, crushed almonds, peanuts etc. and loads of sesame seeds. Lay them out in a thin layer on a baking tray, sprinkle them with soy sauce and stick them under a very hot grill. Its ready when they all turn golden brown and sticky with the soy sauce. You may have to give the tray a shake a couple of times to make sure they're browned evenly. Watch they dont burn though. I sometimes fry up loads of chopped garlic until its crisp and brown, mix it with a little salt and add this to the trail mix too.
I always seem to crave salty snacks when I'm on the hill rather than sweeter fruity mixes and this stuff really does the trick.
george