Bob, thank you for your critique.
The sunset colors were quite intense, when I was photographing the lake sunset on June 20th around 10pm in the Upper Michigan at about 45N°. I wonder if the colors get more intense around the solstice time at that latitude.
As to the processing, I started editing the RAW image in LR, lightened it, increased slightly the saturation (by about 10-15 points), and then took the TIFF file in Prophoto mode to PS where I converted it to LAB color mode with slightly steepened A and B curves, before converting it to sRGB. This method boosts the colors quite dramatically, but it doesn't damage them as much as using the saturation sliders. I didn't change the saturation after the conversion to RGB. I didn't print the image, so I don't know how it would look in printed form, but I suspect the colors in the posted image suffered primarily by the image downrezzing from 24MP and saving it with a rather strong JPG compression (4).
What would be your recommendation in processing such an image?