Not getting into relative humidity ,dew point, etc. the simple fact is that warm air holds more moisture than cold air and condensation will form on the interface of the cold/warm surfaces. So moving air and "proper" application of insulation to help with the sharp transition of cold to warm will help. Ventilation in closed, dead end spaces and reduction of warm mattress/cushions to cold plywood by using hypervent all helps.
If cabinets are joined together you could link ventilation side to side and instead of thinking about blowing air look at small fans that can pull out air causing the warmer air to infiltrate cracks and openings and flowing over surfaces. Keep storage material lean and limit absorbent materials.
Sealing plywood, framing, material surfaces helps with preventing and cleaning mold that can form.
If you have power then a dehumidifier is a great appliance. Keep in mind they can freeze when left in a cold trailer.
Had a sailboat in the PNW so lived with the fight against condensation and mold.
Ron
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