Sandie, you will be well located in Sunnyvale to drive across the valley to
Yosemite. (We are just a few miles up the road) I would suggest staying
in Yosemite Lodge, the moderate priced motel-like facility in the valley.
There are many motels outside the valley, but they can be about an hour
from the valley floor. As to chains, buy a pair at an auto supply chain -
it always guarantees me that there will be no snow. In November we stayed
at the Lodge and then drove across the valley to Monterey. In that area
there is a whole range of accomodations, from chain hotels to beautiful bed
and breakfasts on the water; there is a lot of info on the web. I would
suggest using Monterey or Pacific Grove for your base of operations there.
If you wish, drop me an e-mail off the list when your plans are firmer and
I can give you some other thoughts.