City of Camas has declared firearms illegal in all parks and city property
some preempted but still on the books laws
FIREARMS: Firearms and other code-defined weapons are not allowed in parks or on City property. (CMC 9.28.055 and 12.32.150)
9.28.040 Pistol--Carrying prohibited. No person shall carry a pistol in any vehicle unless it is unloaded, or carry a pistol concealed on his person, except in his place of abode or fixed place of business, without a license therefor as provided for in RCW Chapter 9.41.
No person shall in any park at any time, bring into, have in his possession, or discharge a revolver, pistol, shotgun, rifle, bow and arrow, crossbow, slingshot, spring or gas propelled b-b or pellet gun, spear, or javelin, or any other weapon, except in designated target range areas. (Ord. 1780 § 17, 1991)