I would blast over I80 to the PA border, hug the Delaware river on the NJ side (in Delaware NRA, so 35 mph speed limit, but some gravel if you truly hug the river) up to US206, cross into PA, US209 north to US6, then 6 all the way to Wellsboro.
The only time I camped there was 15ish years ago right on the east bank of the Pine Creek gorge at Tiadaghton. Beautiful. It's a state forest camping area, so free or cheap. I think you need to get a permit these days. It's a very steep unimproved road down to the gorge, so if you go (which you should) I would scout it first then decide whether you want to go down. (But it would be good place to get stuck until you developed the skills to get back up...just make sure you have food.). There will be bicyclists and there, campfires, birdwatchers, and other outdoorsy types with 4WD's. (BTW I did not have my strom at the time, went with someone in a 4WD PU.)
Oops, I lied. Also camped on the west side at Colton Point SP. No showers, and lots flies like it was possessed. Leonard Harrison SP on the east side has showers, but it was full when I went there.