Hi Kristoff, welcome to the board!
You say you haven't gone for the last three years, is that how long you've been sober?
Is there something you can find to do when they head to the bars? Do you use any programs like AA? AA has meetings worldwide and it's possible there may be one where you're headed.
Can you do an online search of sober activities in that town? Meetup.org might have something.
I understand your concern and it's good that it's there. I think it will be key to plan ahead for the times you would normally be drinking so you have other things to do.
Or......don't go.