If you spend 4 nights in Sequoia/Kings canyon it won't leave you any time to visit Yosemite and get from Kings canyon to San Fran on the 9th. I would spend the 5th and 6th in Sequoia and then head towards Yosemite, stopping the night [7th] in the Oakhurst area, spend the day in Yosemite and then the 8th just outside the park again, Groveland would be a good place to start your journey back to SF. You could check out 'Yosemite Pines' in Groveland and 'High Sierra RV park' in Oakhurst.

Check out the Sequoia NP site for vehicle lenght restrictions along the Generals Highway, you will most likely have to approach the 'Giants forest' from the North.