Hi Guys,
I recently completed my first adventure race, and while training and racing, I used a Camelback. I have always used one while mt biking, but it was new for the run. I can't stand anything around my waist, so I had no other option. At first it felt weird, but I got used to it in no time.
Now I have to qualify, that I am not an elite runner, and that I am trail running, and not on the street.

If you decide to go with the Camelback, get a small one, the type they use for racing.

Ruth