The levee does have gaps. from Kirby Park going north there is about 1/2 mile of road in the Forty Fort area, including the freeway onramps for the cross valley expressway. I don't like that road section.

Going south on the WB side the road section begins at Wilkes University. The roads are very lightly traveled, so I ride the road, but I think you can ride sidewalks too. just turn right whenever you can, and you will see a ramp to the next section of levee that leads to a small passageway through the wall.

once you get to the bridge just cross it on the sidewalk, then at route 11 turn left. I use the signal and walk across... you can ride the sidewalk to the next left and head down a hill about 1 block where you will see a ramp to the next section of levee. that section is the last, and goes about 1.75 miles... at the end is where i start my Plymouth rides.

if you two are ever interested in riding the Lehigh Gorge, I often have room for 2, including bikes. it is gravel or crushed stone, but it is almost as smooth as pavement, and smoother than some roads in WB. it is great to ride through the scenic wilderness. Or if you ever want to do it on your own, you can rent bikes at White Haven or Jim Thorpe. Depending on how far you want to ride, White Haven to Rockport is about 10 miles, and you can shuttle back... or 25 miles all tge way to Jim Thorpe from White Haven. it is all slightly down hill from White Haven heading toward Jim Thorpe.

Tim and I have ridden from Mountain Top to Jim Thorpe, about 36 miles. A few years ago I rode from Jim Thorpe to White Haven and back (about 50 miles)... but this early in the season we start much shorter.

one minor warning, the 1 mile either side of White Haven is rougher than any other section of trail, so if you start at White Haven, don't get discouraged. I have regularly seen road bikes on the trail, so it would be fine with your bikes, but just know if you start there it does get better.