I like playing Single Player sometimes, is it feasible to play most scenarios vs AI?

[76mm]

Another approach is to play head to head solitaire and take a day or two between turns and thereby depending on your memory introduce some fog of war.

As I mentioned in a different thread, you can achieve the same effect by playing the massive campaigns against yourself--they are too big, with too many units, to remember who is doing what where, other than in broad brush strokes.