I had a similar ding/scratch and it was going to cost me $950 for a body shop to repaint and pop the dent out. My ding/scratch wasn't as bad as your pictures show and I was fortunate enough to be able to buff it out myself and the dent obviously stayed but it can only be viewed if looked at real close and a certain angle.
I would not take it to the dealership unless you are ready to pay some big money... 2-3k upward is my guess. I would try a local body repair shop 1st and I think you'd be quoted similar to $950 however you are in Cali so it might be more.
Or instead of paying what you are quoted to fix it you could use that money toward an aftermarket rear bumper/valence.
