Congrats on 22 days!! Keep up the great work!
I'm going with the assumption that your friends will be taking beer on the boat- and so I'm with Venecia and Dee on this...maybe passing on this trip would be a good idea.
In reading Dee's example, I can relate. Early on I put myself in too many situations where I historically would have been drinking. It was less than fun....miserable even. I didn't drink but my time was the absolute opposite of enjoyable.
Yes, you will have to be around it eventually- but personally I believe it can be much later than sooner.