Please review the itinerary for my trip to the USA – summer 2013

I have made a tentative itinerary for my trip to the U.S. in summer 2013. It`s nice if you can see through it and see if it looks manageable?. I`m very grateful for all tips you guys can provide. I`ve already paid for the airplane tickets and the hotel in New York, therefore I have a fixed arrival in New York and a fixed departure from Boston

Some info about the trip and myself:
I will be traveling solo and I'm a male in the beginning of my thirties. I like to see the sights, nature and have no need to lie on the beach. When I travel alone, I'm generally not looking at the night clubs. I like to eat a quiet dinner and maybe have a beer or two in either the hotel bar or a cozy bar nearby. I`m still a little uncomfortable to eat especially dinner alone so prefer casual restaurants. My budget is quite free, but I try to save where I can. When I`m on a road trip motels is just fine, I like to stay in budget hotels in the major cities. I'm in reasonably good physical shape and I prioritize to stay at places that have either a private fitness studio or where the surrounding areas invites to running (Central Park is a good example)

My itinerary:
20/07/2013 New York (arrival afternoon, Ramada Eastside (booked and paid))
21/07/2013 New York
22/07/2013 New York
23/07/2013 New York
24/07/2013 New York - Los Angeles (Motel 6 Hollywood)
25/07/2013 Los Angeles
26/07/2013 Road trip starts in rental car. LA - to either Cambria, Big Sur or Monterey (Not sure where to stay)
27/07/2013 Cambria, Big Sur or Monterey - Yosemite (Yosemite Bug)
28/07/2013 Yosemite
29/07/2013 Yosemite - Lone Pine (through Tioga Pass) (BEST WESTERN PLUS Frontier Motel)
30/07/2013 Lone Pine - Las Vegas (road trip ends)
31/07/2013 Las Vegas
01/08/2013 Las Vegas (Grand Canyon?)
02/08/2013 Las Vegas - San Francisco
03/08/2013 San Francisco
04/08/2013 San Francisco
05/08/2013 San Francisco
06/08/2013 San Francisco - Boston
07/08/2013 Boston
08/08/2013 Boston
09/08/2013 Boston
10.08.2013 Boston - (departure 09.30 in the evening)

Some final comments and questions:
Yosemite
I've heard some different recommendations regarding if I should use my own rental car or use public transport to get into the valley. I intend to spend the whole day I have in Yosemite to visit various places in the valley.

Grand Canyon
I am very unsure of Las Vegas and the Grand Canyon. Original I planned to take a guided one-day trip to the GC, but I wonder if I should expand the road trip to also include a visit there. It will typically be 1 day to get to the GC, see the sunset. Stay nearby, watch the sunrise, and then travel back to LV in the afternoon. I can fix it by maybe take one day from Boston.

Thank you for reading. I`m very grateful for everybody that takes some time to answer.