Ohiopyle Trading Post at 4 Negley Street, Ohiopyle, Pennsylvania.

Can't recommend them enough. We had a guided raft trip. Our guide was calm and did a great job maneuvering our boat through the river. My son fell out of the boat at one tricky stretch but was right back in the boat. I felt good about the safety measures that they had in place. They know the tricky sections and are prepared for them.
We were surprised to learn our guide was 18. He definitely had plenty of experience, so age was not a concern for me. Turns out his whole family has been doing this for years.
The staff was excellent, exactly what you want, full of experience and enthusiasm.
On our bus ride back to our staring point, one of the guides entertained us by telling about local sites and jokes. It was a fun trip.