Rastcore: I owe a tremendous apology to Grunriese - I checked for the cache the day after his DNF, and it was still there, but I never logged that or notified him. And he was the first to solve! :-/
I checked today and it appears a large tree branch fell and wiped out the cache's hiding place - I could find no evidence of the hiding place or cache. So I am archiving it.
Thank you to all who worked to solve, and find, the cache! Both the puzzle and hide turned out to be a bit trickier than we intended. We have not been actively geocaching in a few years, but we are particularly fond of Glen Providence Park, so perhaps we will hide another one in the park. :-)