Thanks
@Lawrence. I think I've made a change after I came back from the Louisiana trip. I was disappointed the way my images came out, and pretty much blamed it on the D300's not so great high ISO performance.
Which is the reason I got the 7100. Knowing what I know now about taking a photo and post processing, (which is not that much but more than 6 months ago) I can now see that it was not the camera that was my problem.
I'm still glad I got the 7100, but I believe that I could do a much better job with the D300 today.