Your original post was a few weeks ago but I figured I'd chime in based on my experience. Water is essential but it's hard to carry with when you're running outdoors. Anything under 6 or 7 miles I'll carry a small bottle, like one from a hydration belt, in my hand. If it's a longer run I'll wear the belt.

For gu, beans, moons and so on, I don't use them for anything under 7 miles. Rule of thumb - once you hit an hour, if you know you'll be out for another 30+ minutes, then do the bean/gu/moons. I just ran a 1/2 marathon and chewed on a few moons once I reached the 6.5 mark - however, even in the first couple miles of that race I was running over discarded packaging so use your own judgement.