I’ve never plugged into shore power or been to an RV park. I live off lithium batteries a generator and solar power.

Same, only no genny. I've been away from shore power for the past (checking...) 1.787 days.

Many of my nights are spent on the side of a road or a Cracker Barrel parking lot.

I boondock on BLM/FS land mainly, but do stealth in towns at times. I've heard the term "wallydocking" for dry camping at places like Walmart and Cracker Barrel.

Hot Take: I think WM should offer $5 overnights with water, dump, and dumpster in the back corner of the lots. $5 waived with a >$5 receipt from the store that day. Make some money off what people are already doing. :-)

Does this community welcome people like me or should I wait for the old farts to figure out how to create /c/RVlife?

I imagine it's cool here. If not, come over to this community that explicitly welcomes folks that live in RVs: the description there is "Living in vans, cars, RVs, etc"