I finally caught up. Looks like it may be a while before more can make it down from the station.
Not really,since they plan to send the whole Ark to the earth & they have 51 hours to do it.
I'm guessing it will be the climactic moment of the final episode. The Ark will land safely (at least safely enough for the main characters to survive), only to find the camp obliterated and everyone gone, with Clarke's mom totally bummed. Pure speculation on my part.