Also find Camelbaks more comfortable than a belt which I just find bounce around too much with all the weight around one area. That said I don't take anything for anything up to Half distance... although if it was a hill/mountain run I'd probably take something for over 10 miles... Also only take water in bladder pack. If I felt I needed it, would throw some jelly babies in the front pouch.
You don't need anything extra other than normal diet to fuel a 10k. It's just a case of eating right, and whatever works for you. Cut out the alcohol and have a reasonable breakfast at least a couple of hours before. I don't like energy drinks and wouldn't think you'd need that for a 10k but it's personal choice.
Hi, I am a nurse and work 12-13 hour shifts on my feet... Sometimes I do manage a short run or gym session before or after work but certainly not all the time. I then use my days off to do multiple or longer sessions. It is hard and I would say I struggle more than I did when I worked 9-5... I still want to go back to it to be honest, despite the days off. I much prefer structure. However it is possible, it just takes more planning and organizing.
Last weekend I drove for a couple of hours to run a section of the West Highland Way I hadn't ran before.... it was a beautiful day out and worth the drive Longer runs would be boring if I ran the same out and back all the time. Most of my shorter runs are very similar/the same routes, however longer runs often take place further from home and can be made into a day out.