Richard,
I didn't save a preset, so I've tried to reproduce what I did on frame 700, and it looks like the attached screenshot. There's an overall S curve to increase contrast, with emphasis on brightening overall. I also changed the individual R, G and B curves to correct the white balance.
This is working on the JPG, of course. I usually leave the black and white point alone if I'm working on a LDR image like this. I'd use different techniques on an EXR.
On the other frame I didn't really change the contrast or brightness, I just pushed the R, G and B channels around a bit to give the mist the hue I was looking for. If I remember rightly, I would either boost or reduce a channel with a single control point in the middle of the curve.
I would save this as a preset, but I can't figure out how to save a preset from an adjustment layer!?
Matt