[Evil Slayer]

Discovery would probably have to be fitted with special restraints in it’s cargo bay to hold all the extra crew. I don’t think they would all fit in the cabin.

[txroadkill]

I'm sure the rescue shuttle would only be crewed by the CDR and Pilot, but I don't think there will be a big issue with tossing in a couple of extra seats, Story Musgrave rode through re-entry aboard Discovery standing up because “he always wanted to do it”.