Which item in a "winterizing kit" do you believe you need? Have you read the article in PoolSchool about how to close a pool?
As far as winterizing with an SWG, the device won't work in very cold water, so many folks remove the cell and store indoors over winter. There are some brands with "dummy cells" that can be placed in the device during winter. Adding liquid chlorine lasts a long time in cold, winter weather. Other wise just bring the pool up to SLAM level value a couple days before closing and and cover the pool.
Maddie