I always take care of that problem ahead of time...( even though now I'm in fifth wheels ).....but I did have truck campers.
I always buy my next one before I sell my old one--- that way I'm never without a camper.:W
Bought my newest fifth wheel two days before New Year's and then put my old 5th wheel up in March and it sold in two and a half weeks.:C
Didnt Even have to worry about advertising and getting an ad.
I live by the state highway and I put a for sale sign up on my fence--- and two and a half weeks later it was down the road!!!!!!!
Note,there was still SNOW ON THE GROUND.