The wonderland trail was closed for a while from the massive flood damage in 2006, but should be open now if I remember. Here's a good link:
http://www.nps.gov/mora/planyourvisit/the-wonderland-trail.htm

Boy howdy, I wish I had the time to hike the whole thing, but I only have real current experience for all the trails near the Longmire Area (southwest side of the mountain).

The mountain is beautiful year round and is definitely a great hike and a great workout. Lots and lots of good uphill grade to hike through, you get used to it though. Boy, it's real fun in the winter :-)

You're planning to go in the summer, right? If your looking to go in the summer you should be fine finding the campsites, but in the winter I have to use my GPS to find certain camp sites. I have GPS'ed the trails I hike through so I can still follow the trail when the snow has covered up everything.


Most importantly, bring a camera!