My kids have done this all over the world, but I can't envision a Newmar owner wanting to stay locally at someone's house when they already have all the comforts of home in their RV ??
My kidz tend to be into this house-swapping thing. They have just returned from a stint from the wilds of Indonesia, where they stayed in a rather magnificent home while in metropolitan areas, complete with servants, etal.
And it hasn't been all that long since they traded houses and jobs for an entire year with a family in Australia. While the kidz spent the year roaming a dozen countries in the south Asia, their guests in Canada bought a motorhome to spend the year touring Canada. A win-win for everyone!