This is how my county parks define weapons:
Weapon means firearm, rifle, pistol, revolver, paintball gun, or any weapon designed or intended to propel a shot, bullet, or other missile of any kind, or any device capable of discharging a projectile by air, spirit, gas or explosive, or any explosive substance or harmful solid, liquid and gaseous substance, or any spear, arrow, bow and arrow, slingshot, crossbow, spear or spear gun, or any knife, as defined by state law, dirk, Bowie knife, switchblade knife, ballistic knife, or any other knife, straight-edged razor, spring stick, metal knuckles, blackjack, any bat, club or other bludgeon-type weapon, or any flailing instrument or any disk which is designed to be thrown or propelled and which may be known as a throwing star or oriental dart, or any weapon of like kind, and any stun gun, taser or similar device.
Based on this I definitely won't be able to train on county parks property. Not even with my staff. I don't think saying "Look at Kung Fu vs MMA" Kung Fu is fake is going to save me legally lol.