peat moss AND under bridge dirt. I also have some regular dry dirt in a 5 gallon bucket saved for frozen ground. I bed the trap, cover in peat moss, then sift a small layer of dry dirt over to keep peat moss from blowing away and makes it look more natural. What I do, but this is just my 2nd year.

Also, with the dp's. Take a cordless drill and drill a hole into a stump or blowdown. Put your dp in the hole drilled. That way it will not get frozen to the ground which can cause pullouts.