Just spent a week in my SO 8 man with SXL stove bird hunting eastern Montana.
Worked perfectly for 3, gear, and a GSP. We used low cots most of the time and burned the stove after dark. Felt like a palace during the week when there were just 2 of us and the dog.
Super comfy, best tent camping trip ever.
Sounds to me like you need an 8 man and a BCS-2.