Thank you for your feedback. It seems like the consensus is that max black or strong black is 'nice to have', especially if the scene contains a really dark area. But it's not absolutely necessary, and that depends on the subject matter and how it's captured.
Which gets me right back to where I started...
One of the reasons I asked is due to the attached print. To me it perfectly describes what it was like that morning, and reflects my vision of it, while everybody I've shown it to (except my wife, who is my most trusted critique) say they lack black. I'm not saying that either opinion is right or wrong. I'm just saying that it's the luck of the draw to have a taste in what looks good that coincides with what the audience likes.
For this image I think you got it right. I notice the lack of a crisp white in the snow more than the lack of a black. But I wouldn't change it. A crisp white and strong black would ruin the mood of the print.