If you can use the letter "O" in a creative way for your log, either as a tautogram or by using the letter "O" frequently, that would be awesome!
I was at a loss when I was trying to come up with a name or theme for this cache. Only Ogres may Organize ways to Outwit this One. To the trained eye, you may find this one easily. Otherwise, you might be searching for a while. Please be as stealth as you can. BYOP. Safe Travels and Cache On!