I used to drive my first dog Asta up to Tahoe every summer . I would just put him in the crate in the car and off we would go
He loved the car and he was a good traveler . I made the drive all in one day so I do not have some of the concerns such as stopping for lunch and dinner and that you have such as overnight stay for three or four nights . There are lots of books and websites that will tell you about doggie friendly places to stay and to eat .
We would take Asta into restaurants in the sherpa bag. We would ust ask for a booth and slip him in beside us . He never said barked or said Boo . He was happy just to be with us . We would take him potty first then put him in the sherpa . I used to worry about him having to go potty every hour or so but he was fine and my husband usually needed to go potty before the dog . We would stop for gas and a potty break .
Some places in Ca allow dogs outside if they have a patio . Starbucks are fine but they are very fussy about you bringing dogs in to the shop so you need to get your coffee & food first first .
I do not recommend leaving your dog in the car . It is not legal in Ca anymore . Your dog can be stolen and .it may be hard to prove it is your dog . I have heard horror stories It gets so hot in a car in the the summer .
Some motels and hotels are now very doggie friendly and they give you gift baskets for the dog ..
You may want to carry your food, water , crate , favorite toys too and pee pee pads and paper towels just in case . I usually give the dogs bottled water - the same brand as: sometimes all it takes is a different water from a local source to upset their tummies .. I just put it in a small cooler . Of course in those days I fed Asta kibble and it was easier but I am sure you can be creative and work it out . This time I froze his food and brought it with me . It was defrosted when I needed it .
Have fun . These little guys love to travel just as long as they travel with you !! Oh yes I think there is another thread about traveling with pets that you might want to try and locate . I am not good at this but I know Kimberly is a pro and mightbe able to give you the key ..