I'm posting this on 28 April, well over a month after I took the shots.
"Hmm, why did I take so many from the same spot...", I wondered. Then I looked at the exposure values. "Ah, that's why. I was playing around with HDR brackets..."
And so, I grabbed a fistful of frames that looked vaguely promising and had Photoshop hit them with the HDR application.
It's not one of the world's great images but the results weren't too bad, especially considering that (as noted in yesterday's image) I was unaware that I was shooting jpegs instead of raw after an update to my camera firmware.
I did tweak this a bit with a levels adjustment layer (masked to the lower half) and a brightness /contrast layer (masked to the upper half).
The angle wasn't QUITE right; I was aiming to have the sun rising directly over the base of the V between the trees as I recall, but when the cloud shifted to expose the sun's rays it was a couple of degrees off from that.