Maybe its best posed on uk caving.com..
Yeah. Except that with digital its a piece of piss as you can just check the histogram. Don't be tempted just to look at the screen as chances are it'll be so dark it'll look great even if you've chronically underexposed.
Robbie Shone is the man to speak to, he ran a cave photography workshop in Buxton last year. I doubt you'll have chance to go on one before late Jan, though it might be worth dropping him an email or pm (I think he's on UKCaving).
Caves trash cameras. Peli cases are probably a minimum.
And I can use wireless flash triggers - just seen a kit on eBay, trigger and two slaves £30... Cool. Couple of Gorillapods for the flashes..
Thanks Paul, Sam, Bubb, Obi. Caves are dry iirc.. (Desert..) remote trigger needed for camera?
see http://ukcaving.com/board/index.php?topic=13441.0and http://ukcaving.com/board/index.php?topic=9958.0Rob Eavis rates the RF-602's highly, Robbie shone points out that they can reduce battery life quickly, and being a professional, uses these - http://www.calumetphoto.co.uk/eng/product/pocketwizard_plus_ii_wireless_transceiver/703-195a (ouch)
The trigger market moves pretty darn fast (or has done over the last few years) and there is now a lot of reliable functionality to be had for (relatively) very little