That's a tricky one. First of all, it depends on which route you want to go on. Some of the popular ones are already filled. Other, less popular ones will never fill.
You can find what is available here:http://www.recreation.gov/permits/Bound ... rkId=72600
If you know where you would like to go, I'd reserve as soon as possible if one is open.
Two roads diverged in a wood, and I--
I took the one less traveled by,
And that has made all the difference.http://www.snottymoose.com