Keep on pluggin' Papa- Something is bound to turn up! Swimming holes have always done me pretty good, no permission needed in my neck of the woods. Don't forget to shoot the "blind" areas where bashful types may have changed into their suits- as well as near the water, and even in as far as you can.
I know back east there ain't much (if any) public lands left, but get creative in your thinking, the possibilities are endless even without public lands to shoot on.
here's a partial list to get your creative juices flowing-
Schools
Parks
Churches
Home sites
Picnic groves
Swimming holes/Beaches
Athletic fields
Fairgrounds
Scout camps
Ghost towns
Playgrounds, campgrounds, rest stops, sidewalk strips, rodeo arenas, rural mail box areas, old tavern sites, revival meeting sites, chautauquas, military bases, sledding areas, corner lots, towpaths, flea market sites, train depots, amusement parks, family reunion areas, groves, old fort sites, band shells, town squares, construction sites, old farms, fishing holes, mining camps, general stores, trailer parks, hiking paths, orchards, outhouses, battlesites, backyards, racetracks, fence rows, boat ramps, resorts, ski areas, drive ins, motels, roadside stands, college campuses, under boardwalks, market areas, telephone booths, bus stops.........and pretty much whatever else you can dream up. Railroad camps are good too. Look for a span, there's generally a camp near where they built a bridge.
Research, persistence, and luck!
(Thanks to Dick Stout for a good list)
This I got to see 
