BlessedMomof2,
Your questions really hit a part of me that I wanted to share. First off, I’d say, what your daughter experienced seems pretty accurate to what I’ve experienced at Steubenville conferences. It can be very confusing, especially if you’re not used to the charismatic side of Catholicism, and I believe they should have spiritually-trained chaperones and at least one priest per group if possible. What happened there, I have no clue since I wasn’t there and who really does know except those particular people. You are probably accurate with guessing what happened to your own daughter since she is your daughter

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I am a Steubenville grad and what got me there was those conferences. My first one was an experience. I was not totally unfamiliar with the charismatic renewal since my parents were involved quite a lot in it when I was young. I was told I asked to be baptized by the Holy Spirit when I was 2. BUT I hadn’t been totally immersed in it ever, so the enthusiasm was intoxicating and scary at the same time. I loved the music, the rejoicing, the ability to express my faith in different ways (I believe there’s a time for the excitement and a time for definite solemn worship). Adoration was AMAZING! I felt very close to Christ at the time. I experienced amazing depth of prayer. I finally let my guard down and was able to admit where I was sinning in my life (during a rebellious time in my teen years). There was laughing, crying, screaming, people being slain in the Spirit, and lots of singing and praying around me. I was aware of it, but very much as background noise. After Adoration, our chaperones and our priests prayed over us. I was slain in the Spirit for the first time in my life. It was beautiful. That night, I had the WORST spiritual attack I’ve ever experienced in my life! I had been scared of the dark for a while due to a really horrible experience earlier that year that I won’t go into. And my roommates needed dark to sleep. I held tight to my rosary and prayed the St. Michael prayer over and over and over, crying the whole time, before (what felt like forever) I fell asleep. But to me, it was confirmation that the Lord was really working in me and that Satan was fighting. I grew to really appreciate Christ in the Eucharist and Adoration (I LOVE being in the presence of the Eucharist SO much now!) Plus, I talked to the priests about my fear of the dark and all that went with it later in the trip and they talked to me and prayed with me and it helped immensely (one wrote his dissertation on angels).
I also felt a possible calling to the religious life. My friend who invited me on this trip (and the only one I really knew in our group) told me that God was definitely calling me to be a nun. And that scared me a lot. I cried about that too. Then, I called my mom and she told me to let it go - that just because I felt that didn’t mean it was true and didn’t mean I had to worry about it then. Mothers know best

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The next year it wasn’t so “spectacular” but it could have been the dynamic, the teens, or the fact that it wasn’t “new” to me. Either way, I’m sorry your daughter felt scared. I’m no spiritual expert, so I have no advice to give - just my experience.
I spent my four years at college at Steubenville and it’s not as charismatic as the conferences tend to be - it’s there but it’s not “forced” so much - you have the ability to not be a part of it. But Steubenville itself is orthodox and what they can control is as well.
