Considering it was NYE in Ohio, this is truly a bizarre event. Not many recreational RV users will elect to stay in an RV in Ohio in December so it it likely that this particular park had long term residents who use RVs as homes.
The part of the article that I found disturbing was this quote
I've been concerned about having to use a gun in a campground to protect my family because of the paper thin walls of the surrounding RVs. I cannot imagine being around while an event like this was going on.The sheriff said “many, many, many shots” were fired during the incident at the campground...