Thanks for the help Dr. Luke. I could see from the distance I was at that they were about the size of mallards but seemed to have more elongated and taller head/neck portion and maybe a fuzz longer from front to back. Coloring more drab and although I assume the pair was male/female, their coloring was fairly similar. I thought I could make out a little color (white/dark) under the wings so I think Gadwalls is correct!

Hope they come back and I can get better pictures.