Something else for General Admissions (Walkabout) ticket holders to think about:
I agree with @Mankster that the areas around T11, T12 are probably the best for getting close to the cars, together with perhaps the stretch between T15 and T16, but the biggest problem with both these spots are the lack of a viewing screen.
Personally, I would be lost without the screen, especially during the race, since I would have no idea what was going on. There is trackside commentary, but half the time it’s impossible to hear it since the cars are too loud! One way to get around this would be to get the Fan Vision set, which I did get last year for $100 (I think. Could be $150) for the weekend.
If not, the main viewing platforms with screens are the two along esplande drive (stretch between T13 and T14), the one at T16 or between T7 and T8. They will all be VERY popular on race day naturally, so do go early, especially for the ones at T16 and T7/T8 since they’re pretty small.
This all only applies to the general admission walkabout, since there are a lot more options for premier walkabout, but I haven’t bought that before so can’t comment on views for that. From the map, there seem to be quite a few options for screens though.
Looking forward to maybe meeting up again next year @Mankster!