I drove the full west cost of the USA, top to bottom. It was the best holiday I have ever had.
California especially, make sure you see the redwoods, they really are incomprehensibly large, it’s an incredible place like nowhere I have ever been.
Yosemite was lovely, did a couple of days there and fully recommend. Our group did camping in some spots, which felt nice and a bit closer to nature.
I recommend around Santa Barbara staying somewhere in the mountains as the night sky is beautiful, you can see the Milky Way and maybe catch a shooting star (mind the tarantulas!!).
My trip ended in San Diego, which was my favourite city to visit and one that people often miss since many go straight from LA to Vegas. Coronado beach in SD is gorgeous, the sand literally glitters. You can also spot the US Navy aircraft on sorties which is a bit niche, but worth a mention 😊
Enjoy yourselves! I am envious!