If you plan on staying on 15, There are a few decent hills. Theres a decent hill just South of williamsport PA (My old Stomping Ground) that is Curentley under construction, and another one just North of Williamsport PA heading towards Mansfield. It has a Steep grade and is Long. The Road it self For Most of the Trip in PA, is not bad. Near Shamokin Dam / Lewisburg Area you will run into traffic on a comercial type Strip(Target, Starbucks, Fast Food, Car lots, Mall). Once you Hit Williamsport you will cross the New Bridge over the Susquehanna River. Again, This is a tiighter, more packed area untill you get out of town and acrossed the Bridge.
Donnie
1994 Chevy 2500 Extended cab
1987 28 ft travel villa 5th wheel.