Apologies if this has already been asked and answered:

Suppose I send a bunch of drillers to a dormant outpost (such as the game's start) and then gift them before arrival? What happens to the drillers?

schedule the order, scrub into the future, and find out!

Of course. My laziness Ron! Just did that and found out! I'll let other readers discover the answer the same way I did.

Thanks.