(1) The emergency supplies of the base are sufficient for slightly over a month of operation at full staffing, or approximately three months with just the PCs (four days of which have now elapsed). The PCs can secure further supplies through trading with the villagers of Darrastead, buying them from discreet suppliers in the Market Quarter of Iziz, flying their Lambda-class shuttle to Rebel depots, or other, more creative solutions.
(2) There are many jobs that need to be done around the base, and some of them require helping hands from NPCs. For instance, various security sensors, comm arrays, and other vital mechanisms of the base’s SigInt array require constant attention to maintain full efficiency. If the PCs can cajole Toor into helping with maintenance, they can mitigate the wear-and-tear of the array, but to keep it in perfect condition, they need to bring on more mechanics. Similarly, having NPCs to aid with other mundane tasks like communicating with other Rebel bases, scouting the jungle, maintaining a med-bay, and cooking the Imperial ration packs into something vaguely edible could make the PCs’ lives much easier.
(3) Although the PCs can delay the Moff learning of the base’s loss with clever deceptions for a while, especially if they manage to trick anyone checking into the base from long range comms, Dardano can’t be fooled forever. Even if the PCs take great pains to maintain their cover, Moff Dardano is cunning and is eventually going to realize that the SigInt array has been compromised as reports from his agents stop arriving (or shift in tone). The PCs should also remember that the Moff’s knowledge of their off-the-books base is their biggest vulnerability.