I'm posting a consensus version below, including both horizon straightening and cropping the light band at the bottom. I think, in the end, that both changes improve the picture. I had convinced myself that the band at the bottom echoed the wake of the Canada geese and added a sense of movement. Posting on this board can add a reality to check to all the circular ruminations in an isolated mind. Thank you all for your comments and especially to Slobodan for his useful tip. It seems an obvious technique once having seen it, but in 3 years of using Photoshop, it never occurred to me.
One more comment, it's almost April and I just realized I have no idea where my W2 form is.