It’s not just WA. It’s everywhere. New campgrounds are popping up fast and people are becoming disenchanted with the failure-prone covid wagons, so I don’t think it’ll be this way for long.
Figured it wasn't just WA, my parents in FL don't camp as much as they used to, but they're saying the same thing on the occasions that they do go out.
I imagine it'll die off because as you point out, folks will find out that RVs always need something, and in a lot of ways are kind of a pain-in-the-ass. But, man, thought it would have happened by now.
I'm knocking on wood real hard with this one, but I'm going on about 20k miles in my 2013 Airstream with no incidents (bought in 2020). Only major thing I did since getting it was change the original tires and get the wheel bearings repacked. Cross country road trips was what led us to go with an Airstream and so far I haven't regret it a bit.