To complete this cache you will need at least one friend, water, and possibly a TOTT (although the tool could vary depending on how it is used).
Bring along your dog to help blend in with muggles in the area.
As a potentially high traffic area, it may be difficult to avoid being detected. An honest explanation will likely divert suspicion.
Once cache is obtained and log is signed, please be sure to read the instructions regarding putting cache back together. Do not under-tighten nor over-tighten container.
Congratulations to 3rd Times the Charm for the FTF.