Check out this link and also the interactive link for National Park Secrets:

http://www.msnbc.msn.com/id/33859557/ns/travel-family/

I saw this too! We're hoping to take some of the grandkids there just after school's out next year. When it gets closer, I'll be looking for advice. If I'm looking to find the best campground there in June 2010, do I need to make reservations soon or ? What would be the best for Yosemite?

Chris, here's a topic that may interest you: Yosmite National Park, Reservations for National Parks out West.

The last time I was in Yosemite was 1969... so I'd be no help.