Saturday's tend to be a bit busier than weekdays (unless it's EMH day), but not usually so much more that it's wall to wall crowded. Also, many of the out-of-town guests are leaving and arriving on Saturday so that cuts down alittle. Really depends on the time of year.
I see you're going in just over a month. It will be moderate level crowds at the end of February. Saturday's most likely won't be too much different at that time.