Actually, although I thought I was limited to selecting only the minimum displayed 8pt font, that was not correct. When previewing the calendar as shown in my original post, I discovered Print Options / Page Setup / Appointments / "8 pt. Segoe UI" can be changed simply by typing whatever number I want.
Duh ...
It turns out changing 8 to 6 works fine for me for now for an 11 x 8.5 PDF, eliminating the cluttered original appearance. Case Closed. Thank you everyone who looked at this for me.