Tanker operator Hawkins & Powers went out of business at Greybull a long time ago. Maintenance operations remain. Sky Aviation, a subsidiary, continues to operate with rotor and fixed wing, out of Worland; the fixed wing is primarily fire patrol. Greybull does have an on-demand temporary tanker base, though it's not high-use. Billings, MT, is a permanent seasonal tanker base and sees more use. Another affiliate of H&P's, based in Sheridan, is Big Horn Aviation; they do have smoke jump platorms operated in several states.