Nervously looking forward to this. My fitness seems to have gone since the reading half marathon, but am looking forward to pushing myself round the course. It will all become more real when I get my pack. I did like the postcard to confirm entry!
I am 5' 1" so I am not sure height is the relevant issue as I can drink and run, more importantly I used to need to drink heaps when running. I have been training to run without so much liquid but I know without any it does affect my running speed and recently I have stopped at a shop to purchase water when I have felt really dehydrated.
What I did find works well for me though is to have about a quarter of a all tumbler of water before running. This seems to keep me hydrated enough for up to 8/9 miles.
The key though is working out what works for you.
I have some jelly things rather than gels but don't tend to use them in training. The other day a few fruit pastilles were my saviour but it has been trial and error and listening to what my body wants.