I’ve owned an OP-1 for a decade and, as such, I’ve taken it all over. great little piece of gear to have along on a trip. unfortunately, every time it’s traveled I either didn’t use it at all (most times) or didn’t do anything useful with it. so the last time we traveled, I brought a Digitone and Volca Sample. good combo. tons of fun. but again… barely used 'em.
I say enjoy the trip and leave the music machines at home. put in quality time with your gf’s parents/family. you may learn something about them, her, yourself, etc… trips are an escape, even if you’re not that stoked on where you’re going or who you’re seeing. utilize it. and if all else fails and you’re sick of everyone/everything and just want to go home… catch up on sleep.