No, I don't use one.
If you read the instructions of many of them, you will find that they will not work in areas such as a Tuck Camper. They are mostly designed for use in areas such as closets or cabinets.
The biggest producer of condensation is human caused, Breathing. Cutting down on this is not recommended. Also, the longer your vehicle is occupied, the more the condensation is amplified. The reason most TC users don't experience this issue is they refrain from really cold weather and extended periods of occupancy. I often compare this to a dripping faucet. For weekend use, the faucet turns off when you park and leave it. With those that use it for mutiple days, the dripping will continue.
Minimizing condensation is an important factor, cracking a window will not do this alone. Try to cook outside, when possible, especially water saturated foods, such as boiled items, like vegetables, pasta and the such. Dry out wet and snow soaked items outside of the occupied areas (including bathrooms). Limit showering during the winter, or do it earlier in the day, to allow the water vapor to dissipate as activity continues and outside doors open and close. This includes wet towels by drying them outside the camper or the cab of the truck.
Use towels to wipe down the walls, inside cabinets, windows and window tracks and dry these towels outside during the day. I keep one in a ziplock back next to my bed, to wipe things down during the night/morning, then set outside to dry.
Last by probably the most important, distance any organic (clothing/bedding) material away from outside walls. These will wick moisture into these items and start mold. It is that musty smell, often associated with damp basements. This can be a health issue for some. Each winter, I remove all clothing from cabinets and drawers, storing them in stuff bags and sleeping bag stuff bags.
No matter if you use a Dehumidifier, you will still need to take steps to counter condensation, within a confined area. Insulating the windows will not stop condensation. But will minimize it from those surfaces. Condensation will just find other places to condense, when these window and cold surfaces are not available to collect the moisture in one place.
Winter camping has it downside, but the plusses far outweigh these immensely. With a little bit of technique and preparation, this can be accomplished.
OP, yes, you just asked about a dehumidifier, but this is a good place to share tips for others to try venturing out durning the "Winter Season."
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