This bonus geocache is NOT at the posted coordinates.
First, you will need the Adventure Lab app available from the app store on your smartphone.
You will then need to complete the "Wyoming Welcome Center Part II" Adventure Lab in order to get the final coordinates and physical container.
You will have 5 stops to complete before you receive the coordinates.
The difficulty rating of this cache reflects the additional legwork required to unlock the final coordinates, actual hide difficulty is 1.5.