We have a friend that does our pet sitting for us. She is extremely reliable and has experience with chickens.
Awhile back I was chicken sitting for another chicken owner, the pet sitter friend had to take over for me one night when I couldn't get out of work on time. Her job is only a mile down the road, so it was an easy lock up and that's all she did.
I'd suggest asking someone that you know and that seems to like the birds. Then invite them over to help. After a few weekends of visits, here and there. Go out for dinner, or run an errand... Ask them to lock up for you in the evening.
This is a great way to ease a friend into the bigger task.
I also suggest talking to them about "what ifs".
What if:
A coon attacked
A opossum injured a bird
Someone is sickly
Someone needs vet care
They would need to be prepared to cull a bird. I would probably let them decide how... You won't have an opportunity to show them...
I always try to leave a credit card for possible vet visits(with my dog or cat). I attach a note that reads:
To whom it may concern,
So And So has permission to use my credit card for an emergency pet visit at your clinic up to and not exceeding the amount of $XXX.
If the care of said animal exceeds the set amount, please contact us to discuss euthanasia.
Which is AWFUL to write down, but I wouldn't want my pets to suffer. Same thing goes if a bird was injured. Please do her in, I don't want to know how, but don't let a hen suffer hem-hawing around about calling me.
Of course the sitter should know the difference between an injured bird and one that might have an artery severed by a predator.
Okaaaay, so basically you have options! Just be smart about it. I think with these tips, even @SallyinIndiana could go out with family for an evening.
Oh and this same friend house sits too, so if need be, she can stay at my house. That sounds like what Sally would need... Live in help!