this looks like you would have room for hiking necessities and your hydration system.

It´s the only one with a strap around your waist.. A feature you would miss on the others!

functional

Looks like you can organize better.

looks like it can hold more stuff

this one

comfort on shoulder and more classic

I like all the pockets

This one seems to have more storage and it has a waist belt.

Im stuck between this and the camelbak. For light hiking either will do, but I think the camelbak will give you more room for your essentials (first aid kit, emergency poncho, lighter and fire starter sticks, snacks, etc.). Jansport however is abrand I know and trust as far as book bags go, and I believe they offer a warenty where they will fix the bag for you if it breaks. I am not partial to the orange color, but it would give you a little extra visibility if you are hiking near hunting grounds.

A slightly bigger one will give you more room to hold stuff.

This seems to have easy accessability to pockets so you dont have to dig mid hike...

looks more practical