Well first of all don’t count on wearing your issue boots very much. They are huge and uncomfortable, but they will keep you warm if you are outside for an extended period. Most peoples jobs don’t leave them out of doors for any length of time. What you will want to bring are the same kinds of shoes you would wear to work at home. Insulated shoes are nice but not necessary, you can always put on your issue boots if it’s cold. If you are here for a winter send down another pair in case your first pair blows out.