About half of the shows that I've done over the years have been clarinet only books. It's a lot more common than you think, particularly if you get back in the days of Rogers & Hammerstein or into the less "jazz" oriented shows of modern days.
My daughter used to accompany me to shows when there was room in the pit for her to sit. She would help me with page turns and the more extreme horn changes, and in general was a pleasure to be around.
However, on one of my many productions of A Funny Thing Happened On The Way To The Forum, she permanently injured me in an unbelievable way.
I had the quick horn change from baritone sax to bass clarinet in "Bring Me My Bride", and in this production there was virtually no pause at the "My bride!" line that starts the main portion of the tune. My usual procedure is to spike the baritone down and snatch the bass up off of my lap, but since I had Laura Ann there I would instead drop the baritone into her waiting hands and then pick the bass up off of the stand.
However, on the evening in question, I had my fingers more meshed into the rods on the baritone, and thus could not get my hand free before she started to pull it away. The resultant snatch, with the momentum imparted by the moving mass of the horn attached to my hand, tore my rotator cuff, something that I've had diagnosed but did not get fixed in time.
I did manage to stifle the scream that I wanted to let out. Sort of like suppressing a sneeze, only much more painful.
).
