If you have the option not to go on the trip, stay home and look after yourself if you are serious about your detox and quitting drinking. You do not need (and probably won't be able to handle) the stress of being in that situation so early in your quit. I am not trying to be negative, but on the occasions when I have gone ahead to events or trips thinking 'Hey I can do this, I am strong and I do not have to drink' I end up relapsing. For me I think I am secretly searching for an excuse to start drinking again. Weigh your options carefully and be gentle to yourself right now.