I see no reason to wait that long. Your storage is more like a cooler than a humidor. Put your beads inside and a calibrated hygrometer and watch the Rh over the course of a day or two. Once you can maintain a constant humidity level you should be good to go. But I suspect you may have problems. Glass top humidors are notoriously difficult to maintain. With that much glass you dont have any insulation against temperature changes, which in turn may make your rh swing wildly. But once things are stable, load er up.
