Winter Storage

[Carrottop]

We are new to seasonal camping but not camping in general. This will be the first year I leave my trailer at the seasonal site all winter vs. storing it indoors for the winter. The reason I am not hauling it out of the seasonal site and into the indoors storage is two fold. First the cost of the indoor storage has gone up to over $800 from Oct 1 to May 1. Second is that I have a deck right close to the trailer and in all likely hood would have to move the deck, not fun. So my question is what extra precautions should I take more than what I did normally which is to clean it and spread bounce sheets and glue traps throughout the trailer. Someone mentioned that I should buy moth balls and place them all over. Any suggestions would be helpful. I also bought pest resistant great foam to seal up the holes between the floor and corrugated bottom of the trailer.