Hank, you will not be happy with the Coleman 4000 unless you are able to hide it away in a pit, far from your AS. It's very loud, and intended more for an industrial or construction site, not a friendly campground. The 60 hz. designation describes the alternating current frequency, not the decibel (db) sound level.
Look for a campground-specific unit. The most popular are the Hondas and the Yamahas. Happy (and quiet) streaming!
John and Lynn,
Silvia ('06 25' Safari SE FB) and Silvester ('05 Chevy Express 3500)