Hello, Eliasson. Sorry, my english is not very good. Your son and you are in my prayers.
It may be helpful to say, at the beginning of the trip, to your friends and your husband that you don't want to drink. You can say the truth (alcohol is a problem for you) or an excuse (for example, you are on diet). You can say them that you have commited to not drink. This way, your friends and husband may help you to maintain sobriety.