HBO is filming a new five-part limited series about the Watergate Scandal titled "The White House Plumbers". On IMDb:
https://www.imdb.com/title/tt11468254/?ref_=fn_al_tt_1
They filmed in Washington, DC, on 17th Street NW this weekend:
https://www.nbcwashington.com/news/local/hbo-show-on-watergate-filming-in-dc-cars-from-70s-parked-downtown/2813331/
There's a couple Karmann Ghias and Cadillacs, a Beetle, a big Buick four-door hardtop in the back, an AMC Gremlin was further up the street, and the green wagon is this 1969 AMC Rebel Cross Country we've seen several times:
http://www.imcdb.org/vehicle_1162940-AMC-Rebel-Cross-Country-1969.html
Alas, once again Hollywood did not call me, but it's just as well since the Cougar's in the shop anyway.