i looked at the stage photo again, your band does use music stands,
though some of you now use smaller tablets on stands ?
the large one with the perforated aluminum music holder would do,
or bring a similar sized type with the solid aluminum plate if you have one
(we call them Hamilton type stands over here)
the purpose, aside from holding your music is in a pinch, you
can angle them to bounce some of your sound back at you
during moments like that, and angle your accordion a bit more
directly toward the stand as well