I went down to the town hall a couple of years back, spoke to Parks & Recreation and asked about setting up in one of the city parks. Blank stares. Showed them a copy of my license. No clue what amateur radio or ham radio was. I mentioned "Like CB". Still scratched their heads. Maybe they were kidding me? This is a big agricultural area and I would have thought at least "CB" would have lit a brain cell or three with all of the farmers around. It did not. I guess they all use cell phones now from their tractors?? Anyway, my feeble attempt at asking for permission in advance was a Keystone Cops like adventure. "Nobody knew nuthin and they didn't want to know nuthin'". I think the advice above sounds good about zero impact and leaving it better than you found it. I'd sure have a copy of my license on the operating table, a friendly smile, a good attitude and maybe some ARRL information. Please let us know how it worked for you. I still haven't set up in town here.