In reply to featuresforfeet:
Spent many happy weeks at Ulrichen, but years ago now. Easy access (train or bus) down the valley to Fiesch for Aletsch, equally easy bus up the Grimsel for access to east end of area. Have done the traverse Grimsel to Fiesch several times, taking in different peaks each time. Huts/ bivvies/camping spots in all the right places. Love it. Tried camping lower down the valley, but horribly noisy and commercial. Have fun, John.