The slide outs probably have less insulation, different construction and more surface exposure to the cold.
You could just leave the drawers, cabinets and doors ajar or open to help ventilate them.
Winterization of RV's includes leaving cabinets and doors open during the winter nap.
2018 Ram 2500 Tradesman, CTD/CC/SB/4X4/Equalizer WDH
2019 Forest River Surveyor Legend 19BHLE