What is the exact date you'll be driving from PHX to Santa Barbara?
The reason I ask is because there's a VERY interesting town right on the AZ - CA border----The Rock Capital of the World - Quartzite AZ! This town is unique
Famous for rocks & gems and VERY large RV, Rock & Gem and Car shows.
They have the largest Flea Markets and Swap Meets I've ever seen!
There are literally 1000's of Vendors there along with Food Vendors too.
"The Season" runs from November to March with something going on almost every weekend.
Since you're traveling on a Saturday, it's a good place to stop for Breakfast, early lunch. It's about 3 hours West of PHX.
Look at some of the pictures on this link: http://www.qzchamber.com/town.html http://www.quartzsitervshow.com/
The Chamber of Commerce office is in a Trailer to give you some idea of how Classy Quartzite is!
From November to March, it's the largest concentration of RV's, Campers, etc in the World!
The Snowbirds, like a mob of chattering starlings settling into a too-small tree, start landing in November. By mid-January, the mechanical car counter at the Interstate 10 exit is ticking off 26,000 vehicles a day. Within weeks 175,000 RVs cram inches apart into 79 trailer parks
, onto front yards, and spill out seven miles on either side of town. Every year more than a million people reset their internal navigation and drive from Everywhere, North America, to this western Arizona dot on the map. Luxury motor homes, fifth wheels, cab-over campers, trailers, and converted school buses plunk down on the same patch of land.
It's a Hoot!
It's been several years since we've been over there but there's a Western -style place on Main St. that has a good Breakfast. Don't remember the name.
Also the Mountain Quail Cafe 490 Moon Mountain St. (Half mile North of Main St.) is famous for their Breakfasts, Cinnamon Rolls, Bread Pudding & Pies. Good Burgers too. Clean and friendly. http://www.yelp.com/biz/mountain-quail-cafe-quartzsite
Also - http://www.yelp.com/biz/q-town-cafe-quartzsite