In our city the parks chosen for off leash dog parks have been near a sewage treatment plant and on a flood plain. because of this, there are very few people living close by, and the occasional barking disturbs fewer people. Maybe put parks with similar locations at the top of your list, as there will be fewer people using them, or living nearby to complain.
Dr. Seuss~DLH (brother's cat)~June 2007-
Misty~DSH (my cat & Mooby's mom)-?-
MooBoots(Mooby) ~ DMH(Mom's cat)~July 21, 2008-
Sunshine~ Golden retriever X white german sheperd (Dad's dog)~October 24, 2008-