I have a large chicken yard, but since it is lacking vegatation, I am thinking of letting them out for a couple hours in the evening. I have a nearly 2 acre yard as well as timber behind us. Will I need to put water out, as well? Or, will they go back in for water? My biggest fear is that they won't come back in at all. I am afraid they will wander off and get lost, or go roost in the timber. Should I give this a try?