How can I learn about unpublished VFR reporting points?
Wait until the frequency isn't terribly busy on one of your flights, then just:

"Unfamiliar with Creek waypoint, Request clarification"

You can reasonably expect them to either explain the waypoint, or if they're busy, potentially give you a phone number or other contact info to try from the ground.

You can also call an Airport Manager (801-852-6715) for questions.