MikeCL
Thank you!
I'm thinking that canonically the time between the start of the game and sending the SOS signal will be relatively short (i.e., a few days, maybe a month), so whatever you have onboard should be enough. And after you send the SOS signal... well, I don't want to spoil it ;] Let's just say that basic needs won't be your biggest concern
And also I don't want to cram in any survival mechanics. The scope is growing fast enough already