I say, no way.
I've posted an abstract of this study before, but I just found access to the entire study.
Here's a case study which indicated that daily creatine supplementation was not needed to maintain skeletal muscle PCr saturation during a 30-day washout.... yes, 30-days. The study was repeated twice.
What was even more impressive, was that PCr levels increased 45% after the first bout (20-g for 5-days), and only 22% of that increase was lost out of a 30-day time-frame.... that's still 23% higher than the pre-supplementational values. This would suggest that daily creatine supplementation appears to only keep serum levels from being depleted.
If PCr levels remain elevated from creatine supplementation for a significant duration of time, even when not supplementing creatine.... then I strongly feel that creatine can easily be ingested on workout days only, without any depletion of skeletal muscle PCr whatsoever.
EFFECTS OF REPEATED CREATINE SUPPLEMENTATION ON MUSCLE, PLASMA, AND URINE CREATINE LEVELS