Yes, it usually is crowded near the trailhead during the temperate season. But near the big saddle and, as it colder colder, the crowds thin. It is a beautiful canyon giving access to a lot of nice peaks.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe