This makes too much sense to ever gain traction in Portland. Anchorage School District has a summer program in which folks with RVs can park in their lots free of charge in exchange for keeping an eye on the school properties. These temporary residents report any vandal activity, shoo loud kids off the playgrounds after curfew, and so forth. In addition to free RV parking, they can tag into the district’s WiFi, so they can look for jobs or for other places around the state to visit, stream tv shows, or whatever.
The district saves money by not having to maintain a security presence, and city police can devote their resources elsewhere unless called by one of the campers to bust taggers. It’s a win-win for all involved.