My UTW bag came with a waterproof velcro pouch that attaches to the inside of the bag via velcro. It's nice but sort of out of the way and can be a pain to get to if you have a bag full of stuff. I like ETQC's external bag idea. I'll sometimes carry tools in my hip pouch, but it gets kinda heavy with a lock in there as well. If you're on the cheap, just get a pencil case from a dollar store and chuck everything in there.