In reply to boothy:
The traditional valley base is the camp site in Vicosoprano...Good facilities. There are others, but they involve a slightly longer drive to get to Bondo and Laret (Start point for routes on the N side).
For routes on the N Face of the Badille, either stay in the Sasc Fura Hut, or use one of the many bivvy sites above...personal choice really.
The AC guide suggests that for routes on the Cengalo, you should stay in the Sciora hut, but last year (July 2005) it was not possible to approach up the left side of the Glacier (looking uphill). You had to cross under the glacier, under the Col Viale, under the Badille N Face, then cross the glacier high up. For this reason we thought it would be better to stay in the Sasc Fura.
There is a new edition of the Chris Mellor guide to the area due out soon, which should (hopefully) have up to date logistics info.