We went last year, great park. We sat at the end of the straight, Can't really reccomend because the track is so large, you can't see everything from any one spot. the have large video screens in front of the seating areas. They have free shuttles running all the time all the way around the track. We used those to view from different areas. We are taking our motorhome this time. Great deal on RV spots: $395 for Fri-Mon includes 2 general and paddock passes. only negative is the food really sucks.
I sat at the turn one grandstand myself last year because the woman in the ticket office said it was the best place to watch.
I moved to the clubhouse corner grandstand (I think that's what it's called) for some of the AMA practice and Q and it was much better. I'd recommend sitting there. You have a view of a lot of short tight corners where there is a fair amount of overtaking, and there's a short straight that passes in front of the grandstand.
From the turn one grandstand you don't start to see the bikes until they're passing the paddock past start/ finish, then they're past you before you know it. Cool to see them stand the bikes up on their front wheel on the brakes, but that novelty wears off fast. By the time they're into the subsequent turns, they're specks on the horizon (huge track), so it got boring fast. There is a jumbotron there, but it wasn't much help.
Anyway, I'd say the clubhouse corners area is the best.
Keep in mind that the lower row numbers are higher. Row 1 is at the top. Try to sit as high as you can (lowest number row) to see as much of the track as possible, and bring binoculars.
Streetfighers are built, not bought.
'00 955i/ GSXR1000 Streetfigher
'06 ZX-636 race bike
'99 KZ-1000 Police Special
'84 VF500F Interceptor
999 or 998 Streetfighter (next build)
They changed the name of the grandstand but the grandstand you want to be in is called the Ford, Drive one grandstand. Like Nove-R said get a lower # row to get the best views plus the most sun protection.