Thanks for all the suggestions. Spent some of the day pondering this. Now there is another element that I have to add in. M is absolutely in love with waterfalls. In order to score that 10(instead of just a 9.5), I thought about putting the cache near a waterfall. With that said, there are no real waterfalls within 100 miles of where I'm at. So I considered going out this weekend and placing my private cache for recall at some future date. I've also considered creating a public cache, write my proposal and see how many people write best wishes before she finds it. I'm just a bit leary of leaving a ring in the woods for more than a couple of hours.
Fortunately, M doesn't even know this forum exists so chances of here stumbling across it are somewhere between slim and none.