I have stayed away from RV parks because they are much more management intensive. I have several friends that have owned RV parks in South Texas and have sold them as quick as they bought them (and they live in Texas). I would think that managing a RV park from afar could be extremely time consuming and potentially dangerous.
If the RV park is extremely stable and the tenants are long term that could be a different story.
There is some merit to owning an RV park, especially if you find a motiviated seller. Many of these parks were built years ago, and are situated on land that has become very desirable for developers. Your best bet would be to look at a site for the RV industry, called ARVC.org. They are a national association, that works for park owners and vendors. Let me know what state the park is in that you are looking to buy, and I can provide you with the states executive director, who will know more details specific to that area.