Around here usually more often on south facing slopes. Usually around decaying tree matter. You can find them from creek bank to timber edge. Most of what I find are on what I call a secondary break in slope, right near the edge. Where there is the slope from the creek, a flat, a slope and a flat. Usually attributed to green briars, dogwoods, hardwoods. I have seen them almost in a road. I have seen them in a pasture. They have to have spores, moisture, and temperature. Mainly, they are where you find them. Go look after you get rain and then a warm day or two. I have noticed they tend to be in a location for a few years and then they are gone. I have seen spots covered one year, and then never found another one there. If you like fried mushrooms, they are HORRIBLE to eat. I suggest calling me to take them off your hands, as well as any nasty saugeye.
There is a reason people walk miles for them. Like a big kid Easter egg hunt.