Auto save settings should automatically save all settings every X seconds. When StreetDeck resumes from hibernation it will always restore its state based on the settings file regardless of what state it hibernated in.
If you setup HORM, you should change all streetdeck media paths to a writable drive, particularly the application data path where all the settings are stored. You can only use this if you have two partitions setup, one under EWF and one not. If you do this properly, you should be able to just cut power to your system and it will restore to whenever the last time it saved the settings.