UAC castle wall defense

For those of you who participate in uac having your towers, sc, fort in the corner of the kingdom map is becoming the norm for its defensive properties. Our alliance has decided to follow this flow but are having issues keeping castles from disappearing. Are there any work arounds that won’t force players to log into each of these accounts every day so they don’t disappear? Our kingdom is in nap. No attacking castles as long as they are tagged. Logging into 30 accounts a day has become ridiculous. Any advice would be great!