I'm not really sure I understand this "One more thing to remember to do". My portable EMS is always plugged into my electric cord, and the EMS is what is plugged into the pedestal. Last time I checked you had to plug into the pedestal to get power to the RV.
In order to use a hardwired EMS, I'd have to do some fancy rigging, plus it would not be easily accessible if I needed to have it repaired/replaced.
OTOH my old SurgeGuard bit the dust after suffering water intrusion. The PI I have now looks to be much more watertight than the SurgeGuard.
I have never heard of anyone having their EMS stolen, not even any rumors or hearsay.