Raven's are everywhere here. Big beautiful bastards!
I do feed them. When I catch a mouse in a trap I usually throw it on my roof as a free meal for the birds. My roof is rather high so it often attracts great horned owl too. Rarely do I get to see them but they can make a bit of a thump when they land. Pretty big sky cat.
When I'm out lake camping if I see a raven i might give them a fish head if I have one. Try not to give them people food.