Hi Bill, I'm new too but have done B & B in the UK before.
I don't use smart pricing. I think my price attracts but also the listing especially photos. 80% isn't bad considering one gets weird requests etc. Stick to your price, but advice from Airbnb is good to a point.......see how it goes........I only go lower for a week's booking. I also try to do 28 days limit to avoid any "residency" issues. Good luck.
I'm in Martinez CA over the bridge from SF if you know people coming my way. I'll certainly check out your listing