How much walking around room can we expect to see in the Reliant? The cargo area looks wide and deep enough to walk around quite a bit (almost Cutlass sized?), but it also looks like the cargo area might compress vertically when it closes leaving not enough space to walk upright in.

Cloud Imperium

It's not a fully stand-up walking space in the storage compartment while the ship is in flight. When you're landed, you'll have enough clearance, but you'll be crouching to walk back there in space.