In reply to Matt Buchanan:
Hi Matt,
Salbit is climbable pretty early in the season - especially the ridges, as they don't have any drainage. You might need to cross snow to get to the routes, and the "easy walking descent" becomes less easy under snow (so you might need to take axe and big boots rather than trainers) - depending on what route of course (some on the W ridge 2nd tower, GKB, Hammerbruch etc, are ab descents).
Eldorado has lots of terrain above it so takes drainage. If its been a snowy year you might find the bottom still under snow, the middle a waterfall, and the descent needing big boots and axe again (once again, normally just trainers in "summer condition").
The biggest problem with "planning" a trip to the Grimsel - Furka - Susten triangle is the weather. According to one local campsite owner, this is the dead centre of the Swiss alps, and hence will get all the bad weather going from any direction. We have abandoned trips there many times due to consistent rubbish weather. On the plus side you can just drive through the Gotthard Tunnel and pop out the other side in glorious sunshine.
Hope you get the weather - Salbit in particular is brilliant, as is the Graue Wand up at Furka.
Oh, and if you haven't already seen it, the new-ish Swiss Alpine Club "Dreams of Switzerland" guide is brilliant for this area.
Post edited at 20:34