There are many thousands of trailers stored in and around MB. Treat it the same way as if you had it home and getting it ready for winter. Do a full winterize on it as we can get some temps in the 20's. Bring the battery home and take all the foodstuffs out of it. In the spring inspect it from the roof down as you would at home. Dewinterize it and check the tires. Do everything as if it was stored at home and don't forget to bring the battery back.
In case you are not aware, there are probably hundreds of rv storage lots in the area. You might want to shop around. Some may offer the same service as the campgrounds. I have not checked recently but not long ago Jellystone Park in Tabor City was a dollar a day and things do not go missing there. It is about 45 minuted to the beach from there.
