Again, underestimating the intelligence of a client is very dangerous. I’ve seen so many videographers get in trouble over that.
Performing arts? Oh heck yes they can deal with full on SMPTE timecode, for sure! They deal with way more complex stuff than you can imagine.
Stop treating clients as idiots, respect their intelligence, just put the timecode on, they won’t freak out. I’ve been in videography, film, and TV broadcast for about 25 years, I’ve NEVER had a client freak out over frame count in timecode.