I've driven East several times on I-78/US 22 from NEPA back to when 'home' was Long Island, and can echo Kevtronic's travelogue take on the area. Between Easton/Phillipsburg and even past the 287 belt is God's Country. Once, I took tiny WEEX Easton on 1230 nearly into the Scotch Plains area on a 'shrug' Nova car radio.
The four huge AEB Class B FMers are gangbusters along there. Pal of mine on the Upper West Side says WODE is a regular by him.
If there's any impreciseness regarding identity and local provincialism in that area, I offer that this 'Lehigh Valley' specification is overblown and holds no allegiance or impact whatever for NW NJ folks except for the toxins it sends into an entity geographically closer to Alpha, Clinton, Annandale et al called The Delaware. Forget this wee Lehigh creek that goes through Allentown. The Delaware separates license plates, states, taxes and societies.
Unfortunately, no huge FM's to boast the prestige of the Delaware Valley exist until you reach Philly.