High Noon refers, of course, to midday. But it also refers to an event or confrontation which is likely to decide the final outcome of a situation. Duels were often fought at High Noon in the old days. Ah! The good old days when disputes were often settled by duelling rather than litigation! Duels provided a more decisive and clear outcome on the chosen day, and were a lot cheaper than getting lawyers involved.
High Noon is also the title of a 1952 American Western film starring Gary Cooper. The plot centres around a town marshal who alone must face a gang of killers for a shootout, when the gang leader arrives in town on the noon train.
So what has this geocache got to do with High Noon? It could have something to do with midday if you wish to find it at that time. It certainly has nothing to do with duelling or shootouts. I suggest you resolve your disputes elsewhere and in a different way.
The geocache name may have something to do with a nearby establishment.