I agree with FFF's advice.
I don't use the ICAO airport designators, which usually have little or nothing to do with the actual names of places. I like to be able to review my logbook and identify where I've flown without having to refer to a table of codes. And 25 years from now, who knows whether all of the airfields you've been to will still be open. Will you still remember that KCGX was the designator for Meigs Field?
Of course, it can be difficult to squeeze a lengthy name into the tiny boxes provided in most logbooks. Your proposed method would avoid that problem, but then you're going to have to do some tiny writing in the comments section if you want to add anything else (unless you use two lines per entry, which is always an option).
Just remember to write neatly, and always use the same colour of ink. Nothing looks crummier than a logbook containing a messy bunch of scribbles in all the colours of the rainbow!
