My son in law is going to start brewing me beer in Atlanta. I live about 2 hours away. Could someone let me know the best method for him to get the beer ready for transport? For example, should he leave it warm in the keg then let me charge it at my house, or should he do the charge first in his fridge? When I transport it do we leave it under pressure, and can you do that by just pulling the ball lock off the keg? thanks