Irishgurl,
I'm a Dad with a daughter and an alcoholic wife. I would want my daughter to go on the trip and I would not feel deserted if she went. My greatest hope in life is that my daughter is not dragged down the path of hopelessness and despair that I am going through.
Please keep writing here and listen to the experiences of others.
I'm sorry you feel distressed but, as a Dad, please go on the trip and try not to feel guilty. You are a wonderful daughter and did nothing to feel guilty about.
Take care.