My girlfriend and I are planning a 3 week trip starting in Las Vegas then travelling in a campervan via Grand Canyon, Zion, Bryce and Yosemite all the way to San Francisco.
Our planned route is here:
We'll be arriving in during the last week of September, and staying until the second week in October.
One question: do you think we'll need to book the national park campsites in advance?
I'm hoping that it will be quiet enough by that time of year that we can just turn up. We'd rather not have to limit ourselves by booking up a rigid schedule up front. Anyone have experience of the campsites at this time of year?