Where to find f/t rv acreage in blue states?

I am looking for rv acreage in blue states - specifically in CO (not near Pueblo), the west side of OR but not coastal, WA - wet side of mountains not near Tacoma / Seattle. Not looking for off grid; want electric and water provided or affordable well options. There are good lots with small acreage, but nearly none of them are for f/t in an rv; they want you to build. I don't want a permanent structure. Thoughts? Experiences?

There's a couple of options that I'm aware of:

1) find a situation that caters directly to mobile/tiny house/RV living, such as a designated park or community which is explicitly permitted to host those units

2) find a county that either has no zoning policy, or very little enforcement thereof, and do what you're comfortable taking on for yourself there

3) find a county that's willing to permit mobile/TH/RV as a primary residence, which is actually becoming more widespread in California of all places, especially in fire prone rural areas

Or let them assume you plan to build and then just don't.