Camping near Hershey PA?

I am going to be camping near Hershey, Gettysburg, Lancaster area with a 40 ft travel trailer. Anyone know a really nice campground with cable and 50 amp, besides Eagles peak, lake in wood, starlite, oak creek, since I have called those places and are booked. Thank you, who over provides campground I book at (if its booked but I liked it most) will get best answer.