re: How do I wrap cakes to freeze them??

I love the differences in our language – it’s the same but different. I am in London UK – we just went to CostCo – and I saw a picnic box – which they said on it ideal for tailgaiting? What on earth is tailgaiting? I know what a backyard party is – here we would call it back garden. But tailgaiting? Do you have greaseproof paper in USA is this the same as parchment paper? We have baking paper over here – as well as icing sugar. (I think you have powdered sugar) Correct me if I am wrong?
PS – completely nothing to do with freezing cakes, as I have never done it!!!