Never measured daily amphour draw from our similar sized Dometic fridge, but on several occasions we have left our rig for a week and our pair of GC2 6 volt batteries had no problem keeping the fridge going, and that includes an interior fridge fan I wired in that runs 24 hours a day.
Sure, batteries were getting drained but still had more than half of their reserve capacity left, I have never considered our fridge much of a DC draw when boondocking. This type of RVing is all about restoring consumed amphours and requires a multipronged approach to successfully run your rig as if connected to the power grid.
