I lived in deep South Georgia for many years and never once "winterized" a camper, nor did anyone I knew. Damage will mostly occur in a sustained freeze where the temps are below freezing for an extended period. Most all the time, it might reach freezing temps at night, but the next day may rise up to 50 degrees or so and there is no danger of damage to the camper. I may have just been lucky, but so were a lot of others that did the same as me...NADA!
"Sometimes I just sit and think. Sometimes I just sit." "Great minds like a think."