Wow, that’s amazing! I would say just honestly have fun and don’t stress about stuttering as it will drain your energy worrying about it. Most people should be decent anyway not to point it out! I remember phoning my Airbnb host on Monday night struggling to locate the accommodation that I actually noticed him stumble on words himself. I can’t assume he has a stutter, perhaps English just isn’t his first language so there was a struggle but I appreciate kindness!