First, your own security...
....if that's your home address on that map, DELETE IT. That's the best way for someone less than scrupulous to know when you're not home. Just say "Phoenix" and you can probably get yourself to the first route easily anyway.
....They have you going 47.5 miles on Grand Avenue, when you could get on the 101 loop??? Ouch. Use a paper map and your own discretion, of course, but I've been on Grand just within the last week, and had to avoid some major potholes.
...Those were the first two things that jumped out at me. As for camping, I believe there are some campgrounds at both NP's (Yosemite and Sequoia) that take reservations. I'd get on the horn now and see if you can catch some cancellations, since they are probably booked up by now. There are sites in the NF's just outside, but you may have to queue up for a site early in the morning as the departing campers leave.
Donna