@Bennosuke
With Marc's good tech roll, and her voidborn origin, would she know how to board the transport?
I'm going to assume that, because the ship is going to enter orbit to the awaiting Rogue Trader vessel, that Arls idea of us getting into a cargo crate might not work. Likely, because Bennosuke will reveal "They vent the atmosphere of the cargo hold while on transport, you both suffocate and die hahaha".
I'm picturing this being remedied/avoided by us storing away in the actual life-support receiving area's of the transport and taking advantage of the small crew number and Marc's voidborn knowledge of ship to direct them to a good hiding spot for a couple of hours. Or, by Marc's tech use having also spotted a pair of rebreathers we can use that'll keep us alive during the trip.