Any ideas of how I could accept crypto payments outside of Clover without making it too difficult on the baristas?
There are many payment processors that you can use for accepting crypto payments and adding them on your website but I think there is a way to add crypto payments directly for your Clover device.
You can try contacting this guys who can add a Bitcoin or Litecoin payment buttons to your Clover POS like you can see in video below.
I didn't try doing this myself, it looks like it's only available in United States and you can contact @jonnylitecoin on Twitter or on their website for more information.
https://www.youtube.com/watch?v=FDRGjiVaooE