How much do you pay for storage?

Mine was to insulate the shed and put a small heater in it. The problem was that all the stuff in the shed would get cold (or cool) soaked and end up at a temperature below the point where the relative humidity reached 100% (aka the dew point) when warmer more humid air returned. When that air came in contact with the cool stuff moisture would condense on it. Of course, the fact that there was salt everywhere didn't help either. By heating the materials in the shed stayed at a temp above the dew point, and the insulation slowed down the warming of the interior of the shed so everything stabilized.

I didn't have the same problems in the rPod because it was already insulated and there wasn't a lot of massive stuff in it that took a long time to warm up, so everything warmed up at the same rate ,and there was no condensation. Never had to put a heater or dehumiifier in there.

The original discussion was about how critical it was to have electricity at a storage site, I'm just saying its not that important. Certainly, if you do have electricity where you store your rPod and you live in a damp climate it's not going to hurt to heat or dehumidify it, I just found it not to be necessary. Don't leave a bunch of cans or liquids in there while its in storage.

I don't believe that dessicants like Damprid will work either because its like the little dutch boy putting his finger in the dike, its not like rPods are tightly enclosed spaces so there is a lot of air exchange and too much moisture to try to remove that way. The more dessicant you put in there the more moisture you'll pull out, but I doubt you're putting a dent in humidity level. Dehumidifiers even small ones remove multiple pints per day. That would take a LOT of dessicant.

You might want to read this about Damprid. 

I lived in Hatteras NC for many years, overlooking the Pamlico Sound and about 1/4 mile from the Atlantic Ocean. You don't get a more humid environment than that. I never used damp rid or a humidifier and I had zero moisture problems in my rPod when it was not in use. As soon as I occupied it there was all kinds of condensation inside. Breathing, cooking and washing was the moisture source. If there is nothing creating moisture in there then it will be fine. 

Damp rid and dehumidifiers are great for interior spaces that are connected to a living space where moisture is being produced but are kept cooler than the rest of the space. Even a small heat source will work because warming the air reduces its relative humidity.