The time allowed varies from county to county. The sticker is that they have to be considered temporary residences in order to avoid a lot of rules. At Port Susan the rules are tribal, not county. You can live there all year if you have 2 sites. Whatcom county allows fewer days than Snohomish for example 120 days vs 180 days. Also sometimes if you work for the park you can stay all year. We have a spot and then travel for the other half of the year. Allowed us to retire early and with a lot more disposable cash. There are many other rules you should make sure you can tolerate....limited structures, restrictions on cutting trees, deck sizes, and, where we are, no roofover parts can touch the ground so it all has to sit on the RV. It's not for everyone. We winter there when no one else is around, works great for our style.