hi…im going to korea with my 2 yrs old son in dec.

Im very worried and a bit regret to sign up the travel group package .
I don’t know if me or my son can survive in the winter.
I checked weather forecast ,the temp will be from minus 6 to 6 deg c!! Im freaking now!

Any one can advise me how to keep my son warm?
can share your experience with me please…