One thing I have noticed works at hill giants sometimes, if everyone is not in a bad mood, is for a ranger to ask a warrior or mage to pick up the arrows and please return them to the ranger that fired them. Politeness counts, and if the ranger doesn't want the arrows for any reason, or is only picking up every 5th load or so, at least you get some arrows free and clear and the ranger can't cry for leaving the arrows around.