Although not specifically an arranger, I remember one particular gig with my band we were playing outside in OKC adn it was unseasonably cold that Saturday. I was using several keyboards (with this band at one time I had 14 keyboards on stage) including a Korg DSS-1 sampling keyboard. This unit required 3.5 floppies to play the sounds and the cold weather made loading cold floppies difficult so the only way to keep the floppies warm were to keep the 4 or 5 floppies in my .. umm... "vault"... so between songs the lead singer would fill some time while I turned from the audience and extracted the next floppy from my... frontal region... the rough part was putting the previous, now very cold, floppy back in the vault for the next time......
Ahh... memories....
J