We stayed there back in 2008. It's a nice campground. The roads and pads are paved, and the sites are full-hookup with 50-amp electric. As I remember, it was fairly quiet.
We have a 37' MH, and I think you would be OK with 42', especially if you let the back of the rig hang over the rear of the site a bit. Sites are arranged in circles, and the sites around the outside are roomier. The photo below shows our site.
I don't know if they have a lot to store your trailer. I know it won't fit on the site unless they let you park on the grass (doubtful).