haven’t read all the above so sorry if i am repeating stuff but a few less obvious things:
– more than one pair of shorts and gloves. The alps riding especially DH is very hard on you and you will find gloves and shorts will rub in certain places after a few days. Wearing a different set of gloves/shorts will relieve the pressure on those areas
– some tape for your fingers! I found that the amount of braking I did not only wore out the pads but really hurts those soft little southern office worker sat behind a desk all day hands of mine so I taped up my fingers again to relieve pressure i.e. wind the tape a few times around the top knuckle on first three fingers before inserting fingers into gloves
– gaffa tape, for the use of. multitude of purposes eg fixing stuff, taping rattling/broken bits on, taping your hands, knuckles etc (see above), repairing split tyres
– cheap two way radios are useful in emergencies or just fun on the longer chair lieft sections
Oh yeah, the BIGGEST advice for anyone new to the alps is take it easy on the first day.
i guess you are there for a week and that is plenty for anyone (come Friday you will be aching all over and glad to be going home) so dont go mad on the first day despite the egging on from your mates.
take it all in your stride, get used to the steepness, the acceleration as soon as you let go of the brakes and the need to ‘feather’ the brakes rather than jamming on all the way down.
that way, you wont break yourself at the start of the week and will enjoy the riding more.