I have a covered "carport" (12X28) on one side of my garage/shop that has never had a car in it. One end is covered shooting position, the other end is wood shed. We mostly shoot >30 meters from that covered position, The lane is 35 meters to the backstop. Then we have another lane, with a different backstop that can go 200 meters that we don't use as much. (no cover)
About 60 Ft from the front door for the 30 meter, about 300' to the other lane.