Im_patient:
i'm a morning kinda guy, and my hospital/city circumstances are very similar to you, so i asked for the LAST appt time of the day. i came in to work early every day, then left early, did my treatment, then the rest of the afternoon was mine. i could run a quick errand (picking up a chocolate shake for instance), then go on home. and if i didn't feel like doing a lot more than crash in front of the evening news, that was okay, and by suppertime, i was usually ready to jump up and do a thing or 2 around the house. my work was very cooperative with me, and i felt like i was giving them the best combination of my hours...
worked for me anyway!
wishing you all the best: may the radiation do its damage, with minimal side effects!
bob