Shauna, welcome to irv2
You don't have to be TERRIFIED
if you would go to "FIND" just above you and type in "winterizing" you will find many answers to your question. Some of us do travel during the cold months or are parked in cold areas.
You haven't said what your camping in a TT or MH. You will find the answers just read what applies to you and stay cool.
Enjoy the forums and post if anything else.