Someone else with logistics info at their fingertips can speak as to whether we have bunk space available for overnighting.
Generally, more cast means more awesome we can put out there, whether it's larger/many-sided battles, bigger bake sales, more interconnected feels, or more poignant personal moments amidst the sturm and drang of louder events.
With more cast we can spare more people for bringing details of the world to light and not just the broad strokes.