So I ran the following test
1 Turned the Refrigerator on and validated that it was in fact using propane
2.Used the battery disconnect to disconnect the 12 volt power
3 Checked the Refrigerator and in fact the propane was no longer flowing
4.Let the battery disconnected for 10 minutes to simulate a stop at a pump
5.Used the battery disconnect switch to reconnect the battery
6.Checked the refrigerator and it had re-ignited the propane
So at least for this refrigerator Dometic DMR702 using the battery disconnect switch seems to work just fine.
Jim