I store my pod unplugged for up to two weeks and never have had a dead battery, I know the CO detector takes a little power, but not enough to worry about draining the battery fast. You could get a small battery operated CO and disconnect the stock one, but I would never run with out one.
I have 2 G24 batteries and get 4 days no problem. 5 if I'm careful.
The only real drains I have is my need for light at night
So many questions.
How long are you dry camping ?
How many/which type battery(s)
Do you have access to a small generator or solar panel to bump up the batteries?
Does your tow vehicle charge the batteries while running, (in a pinch).
Is it going to be cold at night where your going?
rgds John