Might want to check the Community laws concerning RVs. Many communities within Allegheny County have laws pretaining to where trailers, boats & RVs may be kept on property.
For instance.... My community does not allow them to be at the front of the property -- have to be around back, or in the side yard--toward the back. Can NOT be stored on empty lots, unless that lot is designated as a storage facility.
I am lucky, my driveway goes behind my house, and I own the empty lot next to me, so I can cheat it onto the lot next to the driveway.
Hopefully when you say "pittsburgh", you actually mean outside of Allegheny County.
EDIT: Second thought...utilities?????? When you say property, are you talking something that would have full hook-ups, and allow you to use it as a summer home??? NO ONE LEAVES FLORIDA FOR PITTSBURGH IN THE WINTER.:S
You may be able to bondock some land in Westmoreland or Butler county, but you still need to fill-up/dump-off occassionally.