I did this in 2009. It is what started my love affair with the mountains...led to Whitney in 2010, etc., etc. I think mine was a 7 day/6 night deal ... we hit all the camps, with two nights at Merced.
Accommodations are shared and rudimentary, while the food is excellent and plentiful. You can easily keep your pack below 20 lbs since you don't have to carry food, bedding or utensils.
I met a lot of interesting folks at the camps, too. Conversation was never in short supply.
Now, I prefer to carry my stuff, be self-sufficient, and save $$$. But I still have wonderful memories of my loop trip.
If you have any questions, happy to answer them here or offline.
