Maine State parks are enthusiastic supporters of Geocaching! There are some places that have limited Geocaching, such as Baxter Park, which by law cannot allow physical containers (they do support EarthCaching) and where cachers have not obtained permission.
My understanding is The Nature Conservancy does not have the resources to manage physical cache containers, but they do allow EarthCaches and even physical containers if the cacher gets permission and can show they are committed to The Nature Conservancy goals and will honor the commitments to the owners of the land they manage.
If anyone needs help contacting a land manager or owner, please let me know or send a note to MainePublisher using the Geocaching.com website.
The farmer gave permission to place the cache in the field, but the bull charges.