The small town where I live has had a similar ordinance since I moved here in 1992. I've never gotten a permit and no one has ever asked me for one. I know that the pros in town use a few of the parks for sittings and I believe they have paid the fees but again I doubt if anyone has checked. (They have a similar license requirement for folks who want to use a metal detector in any city park. I've seen lots of folks detecting but never anyone checking for permits.)