> Did she pack all the food with her?

Likely. This wasn’t a race, but typical races require you to pack more food than you’ll likely need, and forbid you from ditching it even if it’s extremely unlikely you’ll need it (say you’re going fast and a day from home with a month of supplies)

> How/where did she sleep?

On board, if at all. Typically these crews do 4 hours rowing, 4 hours rest or something like it, but people have been known to do 24 hours on at the start of a race to gain a lead and demoralize the competition.

> What about inclement weather, did she row through it or take cover?

Given the record time, she likely didn’t encounter that. If she did, it’s up to her what to do.

> It seems hard to outrun rough seas in a rowboat so I'm curious what the procedure was for that.

You have a meteorological team at home that tries to steer you around storms and into advantageous winds and water flow. She did +/- 56 miles a day. At 12 hours of rowing, that’s over 4½ miles an hour, so she likely had, on average, an advantage from flow and/or winds.

If you hit a storm, you stop rowing, close the hatches, lock yourself into your bed and try to rest (ideally, sleep, but in a storm, that’s not likeky).