calicamper, wow, thanks for the great breadth of information regarding weather and accessibility.
Graton, we are not set on a time of year to visit yet, was initially thinking for a March-early spring time frame but if its best to push off later in the year, that is fine too. Thanks for the thoughts on the LA-SF portion of the route. The only must do part of that portion would be Big Sur, which we could easily make a detour from SF south first, and then head north.
Appreciate the comments from you too Oldcarnut. Seems like September-October-November is kind of the sweet spot, would be more of a wait next year until we could enjoy this trip....