Composer's note: There are six PARTS. (Although there are seven players, two of them are playing 4-hand-piano, so there are only six instruments involved.) Each part should be reproduced separately, making sure that the LAST page is always visible -- it needs to be read a number of times during the piece. The piano part should be reproduced as double-side/front-back pages, as a booklet.
Here, too, the LAST page has to be visible at all times. So it should be a separate sheet.
The instructions, a general ground plan for entrances & exits (who plays when), and the 'SCORE' for the Tutti passages. Every member of the ensemble should have a copy of all this material.
Given all the stuff a performer has to deal with, I'd advise each performer to have TWO MUSIC STANDS. (Except for the piano part, of course.)