The Honda will also be a LOT quieter and lighter. You may find find the Generac to be too noisy for a campground unless it was designed for that. My uncle used to have a construction type of generator on the back of his 5th wheel and every time he started it up the neighbors in the campground would all close their doors or move further away. He was mostly deaf, so it didn't bother him but it sure bothered the neighbors. Something to think about.
Check around and buy you a used light tower sometimes they sell cheap