I am a letterboxer with 77 letterboxes planted, one of which I also listed as a GeoCache. I chose to list it as a cache because Belgium does not have its own letterboxing site. The approver would not let me include any clues whatsoever. He was either misinterpreting the Hybrid guidelines or was lost in translation, but in order to get it approved I had to list the exact GPS coordinates.
I think I may retire the box because the local 'cachers don't understand letterboxing (or again, lost in translation) and keep leaving trinkets in the box, despite my explicit directions otherwise.
The reason I exclude trinkets is because someone may trade for the stamp by mistake.
