Is your brother in the city or outside of it? There are a lot of campgrounds north, and a couple south of the city that may be more convenient depending on his location.
Coming into the city from New Stanton takes a lot longer than 20 minutes, and you would be coming in from the Parkway East which can be a nightmare any time of the day.
There is a KOA in Washington, PA, right off I-70 about 30 minutes south of Pittsburgh. I've never stayed there since I live here, but it's another option for you.
"Wrinkles only go where the smiles have been." ~ Jimmy Buffet
Don, Kim, Donny Jr., Sarge, Ginger & Buddy ~ Pittsburgh, PA