How about getting the crew to put their bags in the hold? Never ceases to amaze me how much they need for an overnight!
1. At some airlines the short haul crews are doing multi day tours, hence the need for the amount of kit, and
2. Crews sometimes need to transfer very rapidly between aircraft during a working day, so some airlines positively discourage or forbid crews checking in a suitcase (which BTW was/is a major PIA with the current liquids restriction).