In general, you can just wait for power to be restored. The EMS will protect you from startup issues because it delays passing power to the RV for about 2 minutes.
If you have generator prep, your power also goes through an automatic transfer switch. Some of us, as a best practice, turn off the main circuit breakers inside the coach so there's no load on the automatic transfer switch when power is applied (or in this case restored). Same approach when disconnecting shore power.
Our belief is that if there's a significant load when power is applied to the transfer switch, there is likely to be arcing at the transfer switch contacts. Repeated arcing may lead to a transfer switch failure. While this may take a while - perhaps even a few years - it's very inconvenient to have a transfer switch failure.
We had a transfer switch fail during the winter, at 5 PM on a Saturday. Temps were at 10 (F) headed below zero. Took 5 days to get power fully restored. After that experience, I don't mind flipping the circuit breakers as a preventative measure. Is it worth the extra effort? Hard to know. But I can tell you that I would be very pleased to never have another transfer switch failure.
If you don't have generator prep, you don't have a transfer switch and I wouldn't worry about it.