In reply to aliebling:
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> 2. Every year is obviously different, but in March/April, is there generally alpine rock dry enough to climb?
Good call for the granite as usually its prime season for the ski in/out granite rock climbing, especially in the Argentiere basin as the home run (Pierre a ric) takes you back to the bus stop in the village.
The Argentiere basin is usually a better choice for the granite climbing during this period as its lower, more likely to be sheltered from the wind & the routes are less likely to have snow above them.
There are obviously exceptions to this on the granite accessed from the Midi, but do your research before committing to a particular climb.
The other area for climbing is the Rouge on the opposite side of the valley, again only certain crags are climbed on during this period, worth reading the Piola Rouge guide books 1 & 2 for the knowledge.
In addition, there is a new excellent granite guide book to the Argentiere basin, much more comprehensive than the Rockfax but obviously there is a limit to how many guide books you can buy for just a short trip.
Feel free to get in touch once in Chamonix as I'm around during during late March & April & aiming on climbing on the Granite during this period, although last year due to snow, weather & other factors, the granite was out of condition during this period.