Not really offgrid, but…
Love SF. Loads to do and see. Easy to travel around on foot, by public transport, or by bike.
The City Segway tour was fun.
The Pacific State Highway down to Monterey is worth doing (probably further too, but that’s as far as I got), as is the coastal road north.
If you like North Face stuff there is a factory shop in Berkeley.
In Yosemite we stayed at Redwoods cabins, just watch out for bears 😯 .
Go on a few of the one day hikes (we did Yosemite Falls).
Vernal Falls is a nice short walk, but can get busy (saw a bear there at 1pm).
Wanted to go to Tahoe, but the road was closed at the end to April due to snow.
Not jealous. No, not at all. Really, I’m not…..
Enjoy.