I try to automate my sites as much as possible so that when I am a way I will just need a few minutes a day or so to check so that things are runing smoothly..
But I when I travel somewhere I always have my laptop and cellphone with me with numbers to a few friends that I know I can count on to help me out if I run in to something..
Just get some ask a couple of your friends to if they are able to have a eye on your stuff for you just for a couple of days..
This is a though issue indeed.. :/