Definitely put the lights on a timer! It's so much more convenient! How old is Rango? For my adults, I have just given them a salad the morning I left as usual, and they were fine (I was gone for 3 days). For a younger beardie, if you can get some dubias or phoenix worms and leave them in a bowl for him, that would be great (they can't climb out of a bowl as long as the sides are smooth and fairly steep). As long as he's not a baby, he should be fine without food for a few days, though.
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