Moving Forward
You're being loaded to the deckhead with passengers - they're even installing work shelters in the cargo bay for additional bunks and life support. These are normally used in habitat construction and heavy repairs, and are ubiquitous in the Egg System. They can also serve as life pods, if needed. The work crews will rig secondary airtight doors to make the cargo bay shirtsleeve-safe.
Using all four cabins, the second crew cabin, and the 50-ton cargo bay, you will be flying out with sixty people! The cargo bay will have provisions for a common area, so that everyone isn't cramming into the crew area and the upper lounge. The rules call for 14 cubic meters per bunk space, which is 15 feet cubed. So, that's enough room to house extra life support, freshers, and an open crew area.
Thankfully, the four-parsec trip will only take a week...