My experience is that the timing isn't different, but the intensity can be higher due to the reason you state. The herds are closer together and the bulls can get more testy. At least early on when the pecking order isn't fully established.
I've also seen it where they all kind of got in line and one herd after another would hit the water, move on and the next would water. Kind of orderly and not a lot of fighting at all. In both instances, the satellite bulls were all over and picking one of those off was pretty easy.
One other thing that I have seen was they would water at night and were traveling a long way. Like 3 miles or more. I'd catch them on the return in the morning and be near their bedding area. They had no choice for water, but it was too hot to bed near the water. Getting the wind right was not easy on that hunt, but it eventually worked out.
Daylight rutting is temperature dependent, IME. If its hot it is low key and they bugle at night. Cool and they carry on later into the morning. In either, bedding the herd is the strategy I like. Then get the wind right and move in to call or try an ambush on a bull checking his cows.
Sitting water will also work, but isn't near as much fun.
Jeremy
