How long do you get out of your 6v's?

About to go on about an eight day hunting trip and wondering how long you guys get out of your 6v batteries. I will have fridge on propane and using the furnace at night only. Will prob turn furnace way down as I am use to tent camping.
I do all cooking outside and will use water pump minimal


Trailer is 2015 178

Furpod, as usual is spot on.  No one uses their batteries the same when dry camping.  From experience we expect 3 - 4 days from each of our 12 v  deep cycle group size 24 batteries for a total of 6 - 8 days while dry camping at RMNP, Moraine Campground in September when the night temps usually hover in the mid-upper 40's at night so the furnace is the biggest consumer on the batteries.  During the day, while we hike, the furnace is turned off, but we leave the hot water and fridge on propane, they don't use much of either battery or propane.  We switched all our lights to L.E.D.'s instead of using the incandescents that came with our 177.  And, oh yes, our batteries are in their 7th year of service.