It's quite obvious that there is a need for this technology on these tours. They attract a lot of seniors, and a lot of seniors have hearing loss. Good for you to plan ahead. The good news is that this technology is getting used and people who need it are starting to learn it's available. I would be interested to know what kind of technology was in use. I suspect it was FM. We had a lot of FM tech in our community prior to advocacy for preferred hearing loops. FM is great because it's portable, but it requires receivers. You can purchase an FM receiver to use in places where FM tech is used. The only problem is that it has to be able to pick up the frequency that the transmitter is using. Often, that is 72.9 as that was set aside for this purpose. Some receivers can adjust to more options. Mentioning this only because you said they ran out of receivers. I hope that fact encouraged them to make more available. Thank you for sharing your experience. Are you planning to travel again soon?