I don’t recommend a mirror if you want to enjoy your ride. i got one thinking it would help me ride backwards all the way on my commute trips. But soon ditched it in a drawer. I haven’t used a mirror after my first year unicycling.
There are lots of camber suggestions from many of the experts. I remember posting a few. Afters trying every trick and suggestIon I could think of or find — this post is still what I find that works for me.