Ask your local 4H program leader to see if any kids in your area with knowledge of chickens would be interested. Odds are there will be a parent in tow making so mature set of eyes and motivated parties are involved.
I have had kids, high school through college, care for my flock and other animals many times. Preferred approach is to have them house sit as well. I also have them come out a few days prior to help care for animals in the evening and setup containers of pre-measured feed and water so they know where everything is and how to operate in the event you are gone longer than planned. Extra feed is labelled and evident.
I also have so birds are overfed while I am away and call about time everything is to be checked. Plus have multiple flashlights.