The Skunk Train in Willits, CA also Fort Bragg, CA plenty of camping in both locations.
Here's a link to website.
https://visitmendocino.com/listing/skunk-train-willits/
Also there's Roaring Camp outside of Santa Cruz, CA
in Felton plenty of camping around there also
Here's a link
https://www.roaringcamp.com/excursio...st-steam-train