When you find wood, for how long and at what temperature do you bake it?
1) My first suggestion is to breed mealworms. They're not a staple food, obviously, but they're so incredibly easy to breed that it doesn't make sense not to! I went a few months with no carrots in the tote, and I still got a few generations of mealies during that time period.
2) Use pothos. I can buy a plant from Wal-Mart for $2.75, and they grow so easily and so well. You can always grow more from cuttings, and if it starts to get to big for the tank, you just cut!