I'm with Danny..
Prepare for the worse and accept the better..
IGF you do not want to winterize with the pink stuff, I would at least use air and "blow out" all of the water lines after draining standing water... I would also drain water heater.. disconnect ALL hoses, including sewer... IF fridge needs to be on, so be it.... BUT if not, unplug, turn off battery switch and close slides.
There is no way I would leave an RV UN WINTERIZED in Minnesota in March...
2020 3991RD with-
17.5 Goodyear 114's , Titan Disc brakes, MorRyde 8K IS, Onan 6.5..