All my snakes are labeled with their name and my feeding log book is easily accessible and list the size of prey that each last ate, the date, and if they ate that prey or not.
The prey size is properly labeled in the freezer.
I have local people I can call incase I need to get someone to change water. I also have a spare house key hidden in the event of an emergency.
My mouse colonies would probably get wiped out if something major happened, as those things need almost daily care.
Should I get in a tragic accident (coma) and not be able to convey where things are or what to do then my wife knows how to take care of my snakes.