How would you drop them? Don't think a radio transmitter would survive a hard landing, so you will need a proper lander (with altimeter) for each transmitter. And at that point you can just strap your actual payload instead of the transmitter.

The point would be you could drop them a bit randomly, once they land, find out where they are, and tell them where they are, to then talk back to the payload as it's landing.

It's the moon, even a hard landing isn't that hard.