My daughter went on the trip (it was gender-mixed) with a group of her friends. Though it was Orthodox in nature,realistically only she and her friends plus a few other members of the group actually were frum. They were the ones who got up to daven every morning, and paused for mincha and maariv later in the day. Their group did not go to any bars, but the absolute rule was that no one could deviate from the planned itinerary (for safety’s sake).
It was the best time of her life, to that point and instilled a great awe of E”Y in her as she stood on mekomos kedoshim and realized our Avos and Emahos walked there, too. Nowadays, I don’t knwo what the program is like, if it still exists. I had heard the funding was withdrawn.