Cache placed by permission. Many muggles may be about, depending on what time of day you are searching. Use stealth. BYOP.
You are seeking a magnetic key-holder, attached in the usual manner, at the side of the nearby establishment, maybe 35-40 feet from GZ.
Congrats and a special prize to FTF…SandyCreekPirates!
Additional Hints:
Decryption Key (Transliteration)
(Letter above equals letter below)
You can check your answers for this puzzle on Geochecker.com.