I am scheduled to be at IC for three hours Wed (day after tomorrow), and then I planned on going Saturday, but I am scheduling with Call-A-Ride for Friday, instead of Saturday, because I'm stir crazy.
I just got off the phone with M C-A-R, and they said I can call back tomorrow for scheduling on Friday. They only do several days in advance.
It is what it is
I have everything as a Pinned note on the homescreen of my phone via Google Keep, and that is where changing information goes - for both C-A-R and IC. Everything that is non-changing info (e-mail, hours, address, etc.) is in a note on Standard Notes, not to be fussed with.