Well, I was actually calmer than I thought I would be during (and after) the scattering. We found a rocky outcrop overlooking the ocean, and scattered the ashes in a rock pool. The tide was coming in, so she would have been washed out to the ocean fairly soon after. Mum had been ill for a long time, and unable to travel at all, so I'm sure she enjoyed being back at the ocean again.
I feel a lot more settled now...complete in a lot of ways.
Here's me doing the scattering. I know Mum would be happy there.