In reply to ralphio:
lots of good advice.
1) you don't need as much as you think
2) if you can be disciplined, slightly more space in a rucksac is nice (ie 30-35l)
3) have a dump before you set off from the hut. try to get it done early (there is usually a scrum after breakfast, so you skip it then have to stop later, loosing time & fouling the environment)
4) put some suncream on before you set off (in the dark). Gives you a bit of leeway when the sun rises.
5) take some sugar & teabags and buy jugs of hot water in the hut...usually much much cheaper than 'water' etc & they'll give you cups etc
6)don't go to be 'dry' - you won't make it up in the morning.
7) have some light shorts to walk up in. and a sun hat.
8) if you take a platypus type thing take a closure cap, otherwise you might find it awkward to get you March tea
Aim to do one or two easy routes to start with and stay high (rushing up and down a 4000'r with lifts won't help acclimatisation is likely to be unpleasant and will cost... (options from the Almageller are good & it's a nice hut - pleasant walk up stay a night do a route, second night and then over Weismeiss).
A lot of huts want to be paid in cash.
Camp-sites will often not charge / discount for nights 'away'. some want receipts (tricky if you've not used a hut). Some say hey want receipts. Some just take your word (bit like booking the huts, there really is still quite a lot of trust).
If using huts always worth booking...as said they really are quite happy if you cancel (unless you've booked a large group...).
The Moran guide book is good!
Remember, it is meant to be fun.
Be flexible with your goals / objectives.