Well...You're in luck now that the new bridge at Jim Thorpe is open. Last time I can down from the north during a tour it was not. The on-road workaround between JT and Bowmanstown was very hilly.

Camping-wise, Dogwood Haven is dated but a quiet place to camp with lots of shade. I have spent several nights there over the years. Most of the people are mature seasonal people who don't get crazy. The owner gives a cyclists discount. Last time I was there (2018) it was $10/night. Owner doesn't even make me register. I just tell him how long I will be saying and give him the money. It's right off the trail at Lodi Hill Rd. in Upper Black Eddy, PA. Milford, NJ is a short ride away (most by trail and a walk across the bridge). Sufficient market there along with some places to get prepared food. I just rode through Milford yesterday. Another option is to cross over to NJ from New Hope to Lambertville and take the D&R Feeder Canal Path up to Milford (you have to get on road for maybe 3/4 of a mile to get to Milford and then cross pack over to PA). That would take you passed Bulls island Recreation Area. Water and bathrooms there. Easy access to a pedestrian/bike bridge across the river with nice views.

I don't know of any other legal camping until way up in White Haven. The place is actually on PA 940 in East Side, about 1 mile after you cross the river at White Have. All up hill. I would call to make sure they have space during busy times, especially on the weekends. The strip mall the trail passes in White Haven has a good grocery store and a good pizza place. The portion that uses the Lehigh Gorge Trail is very nice in the fall and spring. Summer it's kind of a tunnel of trees with not good views of the river. If it has been dry, expect to get a lot of white dust on your bike heading north towards Easton. I stayed in the Day's Inn there in 2018. Bike-friendly. North of Easton to the Bethlehem area the trail is not always well marked, and in places during mid-June was like riding flat single track.