Has there been any contact from Yakima in reference to your request?
I have found that Yakima County has similar ordinances on their books as well.
CIRCUSES, CARNIVALS, RODEOS, ANIMAL SHOWS AND RIDES, AND OTHER OCCASIONAL AMUSEMENTS, SPORTING EVENTS, OR SHOWS
5.16.010 License – Required. No person shall knowingly allow, conduct, hold, maintain, cause to be advertised, sponsor, permit or conduct any outdoor circus, carnival, rodeo, animal show or animal rides, or any other occasional amusement, sporting event, or show in the unincorporated area of Yakima County without first obtaining a license pursuant to this chapter.
(Ord. 13-1995 §4, 1995: Vol. V p. 247 §1, 1945).
OUTDOOR FESTIVAL REGULATIONS8.10.170
Firearms – Penalty. (1)It is unlawful for any person, except law enforcement officers, to carry, transport or convey, or to have in his possession or under his control, any firearm while on the site of a festival.
11.04.500 Firearms. No person shall possess a firearm with a cartridge in any portion of the mechanism; nor shall any person discharge across, in, or into any Yakima County park area a firearm, bow and arrow, or air or gas operated weapon, or any device capable of injuring or killing any person or animal, or damaging or destroying any public or private property, except where the department for good cause has authorized a special recreational firearm activity upon finding that it is not inconsistent with Yakima County park use and such use is confined to a designated area so posted for such use.
(Ord. 3-1984 (part), 1984).