I use the Earth scent wafers all the time. They are in all my storage containers and scent bags. I used the white oak wafer once when I hunted out of a big old oak that was dropping acorns. The tree was on the edge of a field. I had a doe come out into the field about 100 yards down wind. She walked about 10 yards into the field and stopped, put her nose in the air and walked right too me. She ate acorns for an hour right under me. Most of the time I couldn't have shot her if I wanted because she was right under my stand. To this day I don't know if she smelled the acorn wafer or the actual wafers, but I didn't get picked out, even coming from down wind.
I don't have any expierience with the rut and urine wafers. I would rather use real urine I guess. I think if you are in an area that has pines, the pine wafers would be good. I once read, you don't want to use a cover up that doesn't go with the territory. If there are no pines for miles, don't use pine cover up. Big bucks are not stupid and will know something is out of place.