I would not feel compelled to explain the treatment of my child to someone else. You know what is best for your daughter in a given situation at this point in her life. You have been given the responsibility of her care and know what is best We had the same situation at a youth group trip we chaperoned on. We did a night time check twice! What happened was, at that time I had no clue (duh me) that hot tubs accelerate insulin. I feel so stupid now. Anyway there was a huge outdoor heated pool (this was at Stone Mountain GA, maybe some of you have been there) and the kids were all in there for HOURS. Later that night, he had a couple lows and it was a little scary. But we checked him, gave him snacks, he was safe and none of the boys treated him any different. Its just something we had to do! This is a case where D can be a little embarrassing. But I think you will find her friends will be cool with the night time check if she does any future overnights with a group, or in a similar situation. You are doing the right thing, you know your own kid! It might be good they know anyway. My teen son's pediatrician has a grown daughter who is type 1. She is a in the medical field now, and lives in NY where she is married to a TV Producer. He said she is going great and the most "together" of all his kids! Anyway, he said when she was a teenager, her friends were a HUGE help. They all knew about her t1 and knew what to look for, reminded her to check her bg, etc. It was great because it made it easier for her to be out and about with her buddies as a teen. So I have let my sons friends know. One of them already brought him skittles once when they were doing archery and he was a tad low. T1dm is a disability where you need a bit of extra support sometimes. With a good support system, a person with type 1 can lead a great life!