I had a group of military that were going to be in town for a few days call me last year. They needed ear impressions for 40, or so, members. They could have used the base audiologist to do the impressions but, in the words of the NCO involved, they wanted to spend money in the community when they could. It was offered that if it would interfere with my normal business that they were willing to work with me if I was able to work with them...as in, come in on a day I was normally closed (sat/sun). Luckily, it was a slow week and I was able to see them all over a couple of days during the week...otherwise I would have been happy to open up Sunday to assist them.
I was glad to help them, though I prefer doing impressions for folks, locally, since sometimes something makes an ear impression inadequate for it's intended use. Which means that sometimes I have to re-do them. Much easier to do that then when you're dealing with a traveling Army band.