Nice photos and a good tail on that second one.
I forget the bells from time to time. I have never noticed any real difference in flushing distance. I do try to not use my voice much however. Today, we were flushing deer at under 25 yds. Saw a monster buck today, by the way. Second time I've seen him out there.
I need them since I only see Gus occasionally in the cattails and the grass is even worse as it is often 7+ ft tall and exactly the same color as his fur.