Go to the trip. You can’t let your stutter dictate your life, or else you’ll never be happy. Put yourself out there & go outside of your comfort zone; that’s the only way to ever get over the fear & anxiety of being judged. A lot of us stutterers like to play the “I’m so lonely” & “nobody likes me bc of my stutter”; though I get the sentiment, a lot of it is a mental game & self induced. I had a more than mild stutter throughout school & I was still fairly popular since I had a very bubbly personality. I didn’t let my stutter make me shy away from being social. I suggest testing the waters. It’ll build up your confidence in the long run.