Ok, Petrol is probably going to cost about $40 each, camping is another $2 per night (so $44 all up)
it might be slightly less/more than this depending on how many people sign up...
weather is looking ok on the saturday, kinda crap on the sunday so if it gets any worse may call it off/do something else silly instead - will decide on thursday night or friday morning.
possible options if weather turns crap are mangatepopo, titahi bay, multi day canyoning trip, double brown, crazy crazy tramp, double brown....