Dear lkaufman,
I wish you much hatzlacha. And yes, the Israel trip is bound to bring great peiros, even if you don’t see it right away.
That she is sweet and focused – she’s in school and starting college – should give you great hope. So many of the kids who stray these days seem to not have anything substantial to focus on. That your relationship and view of her is so positive is wonderful.
Maybe as an adult she will meet people who will reach her in ways that were not accessible as a child. There are great Jewish college programs and wonderful people on campuses. JAAM, and the Maimonides programs come to mind.