I work at a university, so people are always graduating and moving away. I've had at least nine cham sitters over the past eight years - only one of whom has prior reptile experience - and nothing's gone wrong (knock on wood!). I bring them over to the house the first time to show them where everything and everyone is, and I have a couple page write-up that goes through all the information again (where the bugs are, how many bugs, how to feed the bugs, dusting bugs with vitamins, how to feed the bugs to the lizard, how to water). I buy crickets just before I leave (find it easier to have the sitter feed just crickets than to have to rotate feeders), and leave money in case there's a cricket die-off. Most of my lights are on timers to begin with; any that aren't I put on timers when I go.