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If you are flying in and establishing a base camp to hunt from then I would look at taking a mountain radio. We always take one when hunting this way. Looked into getting a Sat phone, but the cost seemed a bit excessive, unless you are going into a Wap block etc where you are carrying everything on your back so weight becomes an important driver.
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I have a watch that give air pressure. It provides that rate of change over periods. increasing pressure, more settled weather, decreasing pressure, time to head home of for a hut.
Need to take into account your elevation change too though..........