Well, I'll resurrect my info...
Referencing the Google maps link I posted, the bank of 3 courts at the top are normally combined into a single court (I believe it's labeled as Grandstand). The single courts to the left & right are practice courts, as is the bank of 4 in the lower right, below the clay courts.
The bubble area at the bottom is another bank of 5 courts, but they only play on 3 of them, using courts 2 & 4 for seating. The one in the middle is normally the bigger of the 3 as far as seating.
Other than the lower levels of Stadium, all seating is pretty much open (i.e., first come, first served). If you go during the week, you can normally 'sneak' into the lower levels during the evening session. Two years ago I was basically courtside for Kyrgios' first round match. We were constantly on TV as his personal box was 2 down from us, so he'd go over & chat w/ them and the camera would follow...
Food & drink is expensive, as you'd imagine. Last year I think I paid $9 for a Stella (It was $8 for a Budweiser, and if I'm spending that much for a beer, I may was well get something halfway decent).
The "best" days to go are normally Tuesday and Wednesday. That is when there are plenty of good matches on the outside courts, along w/ some of the seeds playing. I remember years ago watching a "then little known 17 yr old Aussie" play doubles on one of the smaller courts. That was in '98, and was Hewitt playing with Draper. Two years ago I watched Rublev lose to Gojowczyk on the same court...
Wednesday is probably the best overall as that is when most of the seeds play their 1st round (and I'm hoping Rafa plays that day).