Not in, but near our first cache, we found a Metallica baseball cap and Victoria's Secrets brassiere.
In another cache we found a used lipstick (bleech.)
Dave,
I think your warning is a bit diluted by the offer to come help if finder
disregards lthe warning and gets stuck.
I think I'd just leave the warning part and edit out the "if you get stuck" part.
K&R