I'm still not landing it consistently, but I did finally manage to land my HS Backroll!
Also in this video: About 7 attempts at an Air Backroll (HS Backroll without the wake) and one pathetic attempt at a Tantrum.
Total time it took me to land my first one was ~3 years. If I had someone who knew how to do it coaching me, I could have done it in less than half the time.
Locations: Delta, Lake Shasta