As I mentioned in another comment, the Goenka courses actually easily accommodate up to 9 hours of continuous sleep at night, from 9:30PM to 6:30AM. The pre-breakfast meditation is encouraged, but entirely optional. You could even nap for another hour after breakfast. There’s also an hour to hour and a half of nap time after lunch.
I personally get 8-10.5 hours of sleep a day when doing a Goenka course. I go to bed at 9:30, have an alarm that wakes me up at 5:30, nap after breakfast from 7 to 8 and nap again after lunch from 11:30 to 1PM.
In my experience, anapana is more difficult and brings up more stuff because, unlike vipassana, simply focusing on the breath doesn’t provide a way to deal with the stuff that comes up.
The thing to remember, though, is that you are trying to focus on breath (anapana) and body sensation (vipassana). Specific thoughts are more or less a distraction. Of course, your thoughts and mental state are tied to the sensations you experience, but because staying equanimous to the sensations is the tool your are using, the actual content of the thoughts are not something you are trying to focus on.