"bush flying" in the suburbs?

Among other aircraft I've been looking at the Zenith Air STOL CH 801
lately, which attracted my attention purely as an inexpensive and eaily
built plane to cart my family around. http://www.zenithair.com

But the advertised 390-ft fully-loaded ground roll got me fantasizing
about all the convenient places I could land with a STOL bush plane.
Somebody give me a reality check -- even in relatively densely
populated suburbs, there are a number of large open fields suitable for
a bush plane. As it happens there is one such within walking distance
of my parents' house in the northern D.C. suburbs, and there are other
flattish largish open spaces near other places I visit. Has anybody on
these newsgroups had any luck convincing random private landowners to
let them land on their unimproved property? Anybody even tried? Are
there likely to be local ordinances prohibiting intentional off-airport
landings in the suburbs? Lets just leave aside for the moment the
pesky little question of whether I'm qualified for this kind of
adventuring...