I'm just starting to look at this.
Innitial reason was for the Cubs. Idea is to set up and register a new cache on a footpath crossing the Farm. In the box will be 6 TravelBugs, one for each Six and one for the Leaders. Want to see who's tavels furthest, passes through most caches, or 'meets' the most Scouts during 2012. There'l be some Scout themed swaps in the box and a logbook aswell.
After the year we might change the 'mission' to trying to get them back to the starting cache.
Once I've got my head round it all I can use as another point of interest for learning the Navigational skills with the Cubs. There appear to be quite a few caches in striking distance of our H.Q. by walking or short minibus run.
As Nick said, will try and find some near points of interest, use for other subjects.
That's the plan anyway, see how far I get.
My own kids seem to enjoy doing it so far. Havn't got a GPS yet but have found 4 using a map localy. Doubt we'll get into it as much as some do, but should be interesting to dip into now and then.