Here's the Wyoming law about "packing services". I have my own stock, so don't have to worry about it. If someone else has a different take on this, I'd be curious. So, the way I read it, if you were packed in on horses for hunting, the packer would have to work for a licensed outfitter. Outfitters definitely have too much stroke in Wyoming.
23-2-407. License required for outfitters and professional guides.
(a) No person shall hold himself out as, engage in the business of or act in the capacity of an outfitter or shall engage in the occupation of a professional guide as an independent contractor or as an agent or employee, unless he is licensed as an outfitter or professional i) "Board" means the Wyoming state board of outfitters and guides established under this act;
(ii) "Outfitter" means a person including a hunting club, who advertises or holds himself out to the public for hire or remuneration to provide guide or packing services for the purpose of taking any big or trophy game animal, excluding any person who furnishes pack or riding animals and other equipment only to a hunter for his personal temporary use and any landowner providing outfitter services on private lands owned or leased by him. As used in this paragraph:
(iii) "Professional guide" means any person employed by or operating under an independent contract with a licensed outfitter to furnish personal services for the conduct of outdoor recreational activities for the purpose of hunting animals except any person employed by a licensed outfitter solely to care for, groom or saddle livestock, cook, cut wood or to transport people, equipment and personal property;
(iv) "Packing services" means transporting for hire or remuneration, hunters, game animals or equipment in the field for the purpose of taking any big or trophy game animal;
(v) "This act" means W.S. 23-2-406 through 23-2-418.