It seems the government is never happy with anything that they didn't come up with, or are not able to tax. The caches would go missing if kids or some jerk not knowing what it was, were to find it anyway. I doubt if the park board is watching this site to find the caches anyhow. So just hide them a bit better off the beaten path. Next time I am in the area, I will be sure to hide one there just for kicks. All property left for any length of time is usually deemed abandoned, within legal discretion.