Posted coordinates are useless. You'll need to find your way to Harrisburg Library and Park, and be observant of the unusual speed limit at the entrance.
If SL is the speed limit in miles per hour, then the final coordinates are:
N 35 18.(73.85 x SL) W 080 39.(39.38 x SL)
Gnxr n jnyx nebhaq gur svryqf, ohg qba'g tb zber guna n srj srrg orlbaq.
Take a walk around the fields, but don't go more than a few feet beyond.