We are going to the parks in late June with our trailer. I was originally planning on staying in Dorst Creek campground, however their reservations start July 1st and I am not sure the campground will be open in June. I was wondering what area people prefer to stay in? We will be there 4 nights, 3 full days and have 3 young kids 10, 8, 5. We want to see the main sites: General Sherman, Moro Rock, and of course all the Giant Sequoia groves we can.