Hi MG, I would carry your usual water bottle with a weak mix energy drink or whatever you are used to on your long runs, put two easily ID bottles of drink out for the drinks drop (large cheap pop bottles??) and fill your 'carry' bottle at the two stops.
Carry a couple of gels and/or bag of jellie's for later in the race, but don't eat too soon or you may bonk.
I strapped an extra energy gel to my bottle for the second drink drop when i did this race, but someone may nick it, so be aware!!
If you have anyone spectating, get them to look after your bottle or hand it to you (the top guys probably do)
Last thing, get used to your drinks and gels on your practise runs to make sure you can stomach them.