I have ridden the D&L several times during tours, but only from Whit Haven down to New Hope, and some of that not recently.

As for camping, there is a private campground on PA 940 a couple of miles from the trail. PA 940 can be busy certain days/times, but it's not dangerous.

There also Mauch Chunk Lake County Park and a private campground outside of Jim Thorpe. Both require a pretty good climb to get to. The latter is expensive *$45, IIRC) if you are not a county resident. The former has some bad reviews. Sounds like the owners can be a real PITA. One option is to take the Switchback Trail up at least part of the hill. Never ridden it.

There is Dogwood Haven right along the trail at Lodi Hill Rd. in Upper Black Eddy. I have stayed there several times. The owner is really nice. Only $10 for cyclists. It's relatively small and consists of mostly seasonal campers who are older and not rowdy. Somewhat further south there is a municipal campground. Forget the name. I believe it is operated by Bucks County. IIRC, you need to call and make a reservation.

Those are the only legal camping options I know of. Indoor options in the Jim Thorpe and New Hope/Lambertville areas will cost you an arm and a leg.

All that is to say that camping/lodging options are not nearly as convenient as they are along the GAP. The D&L also has some really boring parts. Bowmanstown to N. Catasaqua was mostly a tunnel off trees when I rode it in September. Couldn't wait to get off it.

Definitely look at the map for closure/problem spots.

D&L Map - D&L - Delaware & Lehigh (delawareandlehigh.org)

One option is to cross into NJ at Milford and take the D&R Feeder Canal Path south. Much better condition. You can pick up the D&R a mile or so south of Milford or wait until you get to Frenchtown.