Now that makes more sense. When I did a google search for my day it stated that the mall was just opening after the shooting. I know NJ/Philadelphia are sort of close to each other, but it must have given misinformation on the search.
I am not afraid to go to the mall (well it is actually not even a concern now that you cleared it up) I was concerned more about traffic etc.
So that answers part of the question, anyone on how long to walk around Valley Forge?
Yes, Philadelphia is close to the NJ border, but King of Prussia isn't exactly around the corner from Philly, and Paramus is nowhere near Philly - in fact, it's north of NYC. The K of P mall is about 120 miles from the mall where the shooting took place. It's very safe.
The King of Prussia Mall complex is actually two malls, right next to one another. You'll want to have a plan of attack, cause there are something like 400 stores there:
King of Prussia Mall
Of course, traffic in that area can get heavy, particularly on the weekend. If you're going any time between Thanksgiving and Christmas, expect the mall to be absolutely packed.
Now for Valley Forge.....I assume you mean the national park. There are a number of walking and bike trails there, 26 miles of trails, but the park itself isn't really something you 'walk around'. It's about 10 square miles, and landmarks are widely separated. There are bus tours that depart from the visitor's center several times a day. I think they're 90 minutes in length, so that would give you time to go for a nice walk on one of the trails and still be under 4 hours. You can also drive around the park yourself, I think there are audio tours available that you can rent at the visitors center.
To get the most out of your visit, check out the maps and some of the area's history on the National Park Service's site.
Valley Forge National Historical Park
Will you be staying in the K of P area, or in Philly?