Do you know whether ii is possible to obtain a used pop-up to fit our Toyota Tundra? (It sounds from your earlier reply to a question as if we would not be able to get a new one this summer.)

Storing and winterizing. Should it be stored with the top up, if it is stored in the garage.

I don't believe it will be easy to find a used pop-up. From what I've been told, they rarely sell used and they are hard to find. Also, depending on your truck bed length; short, standard, or long; finding a used one for your truck might be a little tricky.

There are used campers out there! Just have to look as they sell quick. There is a Facebook group, https://www.facebook.com/UsedFourWheelCampers/ that might help. Check your local Craig’s List. Good luck!