What is Reddit's opinion of Gurin Thermo Electric Mini Dehumidifier, 1100 Cubic Feet, Peltier Technology Dehumidifier Compact and Portable for High Humidity in Home, Kitchen, Bedroom, Basement, Caravan, Office, Garage?

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Essentially you just don't want high humidity swings, in your case with the lack of space and dehumidifer I would just increase the ventilation within the tent itself. Don't leave standing water in the tent, keep an eye on the humidity, and if it doesnt change you could grab a cheap dehumidifer just to bring it down a bit. this is the one I got and it would probably work just fine for a space of that size.