As Chris Crossland said to me and a few others the night before a qualifying event the first time we did PBP over a few concerns we had was, "Don't worry about it, everything sorts itself out", they were immortal words and spot on, everything does sort itself out. As for food and water, I planned on it as I would a 600, carry plenty of "bonk rations" just in case. But in reality on PBP, I did not need it, on the route out to Brest, I was amazed at how available it is and when I got to Brest, I had in reality "recced" almost the whole route back and decided that I may as well just eat everything I was carrying just to lighten the load and just kept a couple of gels just in case. It can be easy to get confused with a 240 or 600+ in the UK where you may go through the night and see nothing open so hence you always ensure you have food with you just in case, PBP is different I found, I never went hungry or without water, your never far from it, distance or time wise.