How much a dealer will charge for winterize a Pop-up?

Dream Girl, since you don't have a water heater, toilet or shower, the only real answer with regards to how much it will cost is "too much". It would take you longer to hitch it up than to winterize it. There are no tools involved and it will take less than $4 in rv antifreeze. Do you have a manual showing how to winterize the camper? If so, just check it out for instructions. You'll be surprised how easy it will be.