I know a lot of you guys have these packs. I need to know, since I don't have anywhere to go physically check them out in person around here, which one I will need for my needs. I am going to be using it for a daily carry. It will have my normal every day stuff, small gear, small med kit, small trauma kit, admin stuff. A spare change of clothes and maybe some drinks or lunch once in a while. Can I fit all that in a 12 with room to spare? Would the 24 be too large to carry everyday? I'm only 5' 11" 180 lbs.