Thanks for the response, but ammo boxes don't enter into the equation here. Costa Rica abolished it's military back in 1949 and consequently does not stockpile ammunition like other nations. Unlike in the States, I've never seen an ammo box here. So far we are using plastic containers, waterproof matchboxes, bison tubes and dummy electrical plates. The dummy electrical plate is the only one that has remained in place over the years. All the rest tend to vanish on a regular bases, despite our best efforts in concealing the hide.
We want to focus on tourist areas because there are very few active geocachers in this country. Unfortunately, tourist areas are also the places were we find most of the muggles. Tourism is Costa Rica's largest industry and the probability of attracting more geocaching tourist is higher than attracting new members from the local population.
If you come up with any other ideas, please let me know.
Thanks,
Pat