sounds like you've got the right stuff, i'd ditch the i.5 ltrs of water and only carry 500ml, the petrol stops normally have loads of free bottled water so you dont need to carry much, the adjustable spanner is the best solution to all those spanners ( take a drill or hack saw to the handle if its bulky / weighty) put the split link on the throttle cable , make sure you can actually pump up the tyre with your super light pump ie take the tube out at the front and refit and see if it works same with your co2 stuff . you ''l be taking the bag to the top of each group of sections as you inspectthem and leaving it there whilst you ride the sections, meaning that you'll only wear the bag when riding between sections/ groups. dont forget something to eat for a little bit of energy chocolate bar/ chewing gum/ banana.