Do you rotate the camp at all? I realize I rotate mine so the tall tower doesn’t stick up, plus I think it looks nicer that way. I wonder if rotating affects the drops at all.... I am on level 9, the first few days I was collecting 9am PST when I switched to 6:30-7am PST my drops changed for the better. So maybe the Time we collect can affect whether there is a drop or not? Except for the past 2 days I am back to 1 in 3-4 collects giving Troll Essence.