First off. The link from Moke is outstanding. I read a bit. And bookmarked it for later. Very nice.
I can easily go up front. And fly low. No problem. The piano is not the feature. Just another instrument in the ensemble. There is also a good chance it will be pushed back a bit as the is no Tympani player this session.
I’ll plan on setting up on the receptical. I think I could even push right up to the stair. And be about Seat high on the conductor. If that would better. My stand is 4’ at lowest. ( C-stand from film industry) But it have a carbon fiber tripod I could use to go low.
My go-to stand, in almost all of my recording is the typical on-stage vocal mic stand, that I cut in half. Its a steel stand, and a good heavy base, and fugly as all can be now, with rust, and gaudy bright yellow gaffers tape to warn of the legs.
I carry a series of 3/8-16 all thread rod extensions that I've made, that range from 6" to 3', and including a right angle adaptor made from a 1' all-thread rod. FOr female threads, I use the thread rod ferrule connectors, which are essentially really deep nuts (remember: men are bolts, and, women are nuts. It helps in the hardware store).
So, my base stand is two feet, and extends to 4'; to which I can add as many extensions as I need. So, with a 2'>4' base stand, and the extensions. i can quickly run up to 8', with a skinnier profile. But its a rare day when I go higher than 4'->5'. But I do have a 9' Manfrotto monster when needed (rare).
The pic below is with a 2' vertical extension, and a 1' horizontal extension. 3/8-16 thread rod, covered in black heatshrink to make it look less like thread rod..