gps geo ccche proposal idea

Once a long time ago I heard a story about a guy who tried to come up with a funny way of proposing to his girlfriend. Long story short, he used a ploy of going to see a movie... and at the beginning of the credits. Instead of the usual presentation and the girl saw his proposal in the credits. But I was just wondering, what if you took this same concept and put it in a GPS geo-cache treasure hunt type thing I think a girl would really get a kick out of it... just putting it out there for you geo-caching fanatics who have been thinking about proposing to your significant other.