The trickiest thing was that when I started working the later shift, by the time I got over to feed dinner it was midnight. I had to let the property owner know to expect me late, he knew I was a nurse and worked odd hours, so he didn't care. On my days off, I still had to feed really late so as not to mess up their routine too much. I think I would head over just before bed and feed in the evenings on my days off. The horses were still fed about every twelve hours so it worked for us.
It is a pain to get dirty and try to go to work. My mare is in full board right now, and I keep all sorts of horse clothes, boots and her stuff in my car because to it 15 minutes from my house on my way to and from work. It is a PITA, if I need to stop by I try to do it on the way home.
One thing you can do is leave longer chores for your days off, for instance, maybe just clean stalls and feed, and then clean turnouts on your days off or something. Everyone has a unique situation, so I don't know if you have stuff that could be put off like that to save you time and hassle.