For hiking I always carry a belt mounted FAK for just the reason you mentioned. I also have my Altoids mini-fak in my pocket as it is my EDC and therefore I carry it. My Belt-wear while hiking is mounted on the fanny-pack belt or the hip-belt of my pack so if I were separated from the packs for some reason, I would still have my PSK and my FAK with me as I watched the packs float down stream fall endlessly down into the canyon etc. This is the Layered approach.

My belt mounted FAK has more and larger bandages, tweezers, scissors, magnifying glass, mini-mag, tapes (adhesive, duct, electricians), compression bandage, gauze, Medications, mole-skin. and more but I would have to inentory it to be sure. Started with an adventure-medical kit, added a colemans hiker kit and some other odds-n-ends still doesn't fill the pouch that came with the adventure-medical kit.