Pet sitter here too. and I am gone a lot. My neighbor takes care of them. if she can't i have back up neighbors as well as freinds who will trade off days.
With my neighbor friend we trade off. I help her out with babysitting her 3 kids and she watches my kids. I have it all worked out with the vet. If anything happens she is to take them there and leave them. then the vet get's in touch with me and we go from there.