I've been on a cache like this before what they did was post partal coodinats 30 43.6??
91 56.?8? then have you substitute number from dates on the marker or plaque at each virtual site La Chasser
Ravenous Bugblatter Beast of Traal: a mind-bogglingly stupid animal, it assumes that if you can't see it, it can't see you - daft as a brush, but very very ravenous