My school said you must be at least 2 miles away before they would route buses for pickups. There were exceptions which my neighborhood qualified as there were no sidewalks, and we would have to cross a single lane bridge to cross a 50 foot creek with no pedestrian path. I lived in the boonies, and it was faster for me to cut through cow pastures in a straight line than walking the roads. We just had to make sure the rancher's bull was not going to notice us (or sneakily hang a red handkerchief on one of your buddies' backpack).