This time of the year seems to be the best for trail cameras because of the long daylight hours, but if you have timber or shade from trees it can be a big problem. I have been getting a lot of bear pictures and with the shade during the day a black bear is hard to see in detail and sometimes ruins a great picture. At times I watch the weather and move the cameras to different locations if it's going to be cloudy, especially if I know it will be a daytime photo. Nights are pretty much the same for light colored animals, but here again a black bear needs a contrast or something light around the dark colored bear to make it stand out in the photo.
This cub on the stump photo could have been better if the sun was shining on the stump or a cloudy day.