Any Experience with Mini-Dehumidifiers?

[testcase]

Wouldn't a small heater get the job done? In my safe, I have a device called a "Golden Rod". It's like an oversized fish tank heater and, just raises the interior temperature a degree or three but, sips electricity. The temperature difference is enough to keep the contents of the safe from rusting. Heck, leaving a 60~100W incandescent light bulb burning in a closed up trailer might do the trick.

My first RV was a 17' 2010 Casita Spirit Deluxe Travel Trailer. It was a GREAT way to "test the waters" re RVing without spending a fortune. In the four years I owned it, I logged 50,000+ miles. Great memories!