I’ve seen some online communities where you could start looking: https://www.collapseclub.com/ Collapse Support Discord: https://discord.gg/8yhW9v2W Collapse Discord: https://discord.gg/fZcvs9uM (look at the Collapse Network channel for a lot more links)

I see more posts about people wanting local meetups as time goes on, so maybe you will have luck in your area. If not, there are plenty of Internet People to chat with.

The last time I looked into it, it’s only practical if you’re camping in an RV or trailer which already has the panels and battery capacity. Otherwise the size and weight makes it impractical for just a car.