Wyo. Stat. § 36-8-104: Use of firearms, fireworks, explosives and weapons prohibited; exceptions.

(a) The use of firearms, fireworks, explosives and weapons of all kinds is prohibited in all state parks, campgrounds, recreational grounds, historic landmarks or historic sites providing, however, that:

(i) Firearms and weapons that otherwise comply with state law may be used at such times and in such places as the Wyoming game and fish commission may designate; and

(ii) A supervised public fireworks display may be held in a state park that is not subject to an open fire ban if the fireworks operator has obtained both a special use permit from the superintendent of the park, pursuant to department rules and regulations, and a permit for the display pursuant to W.S. 35-10-203.