Boys, it looks like you'll have to start your own rock camp. Or wait until you're 50. But then again, your garage/basement is much more accessible.
Additionally, for those of us ladies who wish we had a rock camp as kids, Portland's Rock 'n' Roll Camp for Girls also offers Ladies Rock Camp, which benefits the Girls Rock Camp. The camp organizers now say it has become a favorite out of all the camps. There are also plenty of volunteer opportunities for all of Portland's various camp sessions.