HAM Radio is bulky and a license is required to operate one. CB Radio might be another option, but range is a limiter. Cell phones might still be your best bet as satellite phones are expensive to operate.
If you are worried about breaking down and having to call someone, then you are not prepared enough. Unless you need to get to a hospital stat, then you are just out of luck in case you are out of cellphone reach.
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Gelato aficionado.