I put a Dutch door on my chicken coop.
The top half is on separate hinges from the bottom lower half.
That way I can put the food/water by the door and simply fill it without entering the coop.
The feed I store in metal trash cans by the door for easy filling.
I use 2 metal trash cans.
The first trash can is bigger and acts as a snow/rain protector(kinda like a storm door on a house).
The inner trash can holds the feed.
Additionally this prevents the cbickens from running out the door when I feed/water them.