It is quite big, think summer camp for adults. But it doesn't feel extremely crowded. Different from self-supported touring in the bush, though!
One thing I must say though: I don't know how old you are, but at 30-ish we were among the youngest a couple of years ago. The average age is 47. Lots of people who "finally" have teenage kids they can leave home alone for a week.
Also, obviously, all services are in French. People will gladly try to speak English if needed though. My husband speaks very little French but he LOVED it regardless.
If you follow this link: http://www.velo.qc.ca/grandtour/index.php?jour=1 you can check out last year's Grand Tour newsletter (distributed every morning). The menu is on the right-hand side. You can check out the other days at the top (Jour 2, Jour 3, etc.). It rained more than a bit last year though.![]()