Deb – not sure if you will be checking this in the morning, but from where you are, you can probably just shoot over to 24/78 east to the Pkwy then down to the NJ Tpke and follow the PA Tpke directions.
But, here is an alternative route:
I will probably shoot out through Flemington, and then down 31 to 95 South (the other 95). There are a couple of DDs and WAWAs along this route for coffee.
Once I am on Rt 95, I will get on Rt. 1 South in PA and then get on the PA Tpke from there (you cannot get on the PA Tpke off that route 95)
Hope this helps