I've got an entry for the UTMB and three of us are stopping here. Flying out Weds, flying back Mon.
http://www.hb-247.com/aff/travellers...chamonix/25248
£12.66 per night....basic - but you'll sleep on a clothesline after the UTMB (won't be there for Fri / Sat nights either).
think they charge a bit extra for linen but I'll prob just take the sleeping bag. It's in Cham too and that has lots of appeal.
Cheers - Mark...