I'm planning to hike the Hayduke in spring 2019 and considering caching food at a few road crossings. In order not to have to return to the cache locations, I'm considering burying my food cache in OPSAK bags advertised as being waterproof and odorproof. I could use the empties as trash bags. I'll also bury gallon water jugs in a few places. Anyone see a problem with this approach?