use your camelback, you will easily fit all your kit in that.
You wont need:
Sandals/flip flops
Towel or soap just your tooth brush (cut it in half) and paste
a change of kit for every day knee warmers are cool, pertex is v light and shower proof
every person to carry a full tool kit make share the load (inner tubes you will all need)
ps you bag will weigh a ton with a full 3 liter bladder in before you put anything else in and when you pack it fill your bladder as it takes loads of space.
Pack light really light you have got some big hills from the word go and carying a bike a 6 days of gear is not nice.
I took some ronhills and a base layer tee as eve wear, used the towels and washing stuff provided by b&b, shared tool kit (3 pumps and multi tools any one?)
Ajustable forks are good I have some talas forks and they help ajust the angle for dh and road blasts etc..
Dont change your saddel and buy some good shorts and a light weight pertex windproof