Chest rig, as in Ironraven's "Ditch Kit". You can wear a chest rig 24/7 if need be as it doesn't interfere with a pack & waist belt like everything else I've tried. As a bonus, you can also carry more survival gear than a pocket kit (but carry a PSK anyway) and keep certain items readily accessible without taking your pack off to get at them.

I'm working on sewing one up for myself right now.