Sorry guys, but the law is on the books right now.
You can order tags online
Idaho Invasive Species Fund
It's a pain and I don't like it, but with a fine of $57 each (and we have 10 boats launching MF in June) that would suck to add $570 to trip cost in case they do show up. And if there are two or three trips launching each day that don't have the tags they could make bank.
This is an Idaho law, proving what focktards we have in the legislature here. So your CO motor tag will do nothing for you other than it might look similar.