Hi...and Welcome to the Forum!
While on my Camino in April 2008 on the C F, I had the opportunity to speak with many pilgrims that had walked the Way in different seasons and along other routes. The one consistency was that early in the season (Mar-May) and later (Oct-Nov) could (depending on which route you choose) be bitterly cold and wet. The Summer ( June-August, when most folks are on vacation) was HOTTTT!
Add to the mix a Holy Year...2010 and the crowds increase in number.
Now, all that said...things can change!
May I suggest that you consider the following:
There is a raft of info on the Forum. May I suggest you check the following:
1. The Pilgrim FAQ at the top right of the page.
2. The Class of 2011 (when established) to see whom else may be walking the Way at the same time
3. The Camino Calendar at the bottom of the page will also show whom is walking, from where and it also lists key events along the Way.
4. There's also a "search" capability at the top right. You can enter a keyword, such as: "food", "refuge Leon" and it will search the Forum and return links.
5. Another great resource is:
http://www.mundicamino.com/
Hope that helps,
Buen Camino,
Arn