Agree be careful with the sprouts. I wouldn't quite go so far as say stick to a bland diet, but I would suggest not going too over the top on rich food and drink. Your bowels and weight need to remain fairly constant throughout the treatment.
I don't know how far you live from the RT hospital, if we have a harsh winter consider having a hotel as a back up plan, not necessarily for the whole course, but somewhere you could book, if the weather forecast was bad for a few days.
I assumed I would wake up with a dressing on the perineum, but no, absolutely no pain or even evidence that I had the treatment: sit, walk all fine.
The catheter I referred to in the earlier post was a urinary one presumably needed for 24 hrs as the prostate will be bruised by the treatment ones.