There are multiple grandstands to watch from, you can belly up to the fence almost anywhere you want. The place is huge, there are shuttles constantly looping the park for you to hop on and off for free. You can bring in a bike to ride if you prefer. You can rent a golf cart if you prefer. Camp or RV in the large "Duck's Head" area on the back side of the track, right up against the fence if any spots are left. Fence spots that is, plenty of spots not on the fence. No hookups back there, though. Grandstand seats are first-come this year, not reserved. But you do need a grandstand ticket. Best to just go here, it has everything you need: http://www.bigmweekend.com/
I rode the track and it didn't seem like it had much spec spots. None whatsoever inside the track all on the perimeter.
By far the best view I think is the grassy picnic area in front of the clubhouse on the east end of the track.. tons of action to be seen there, plus there's a jumbo monitor.
For sure. Thats the 'Wind Up' and 'Release' complex of corners - good section to spectate from. The closest you can get to the track is probably the section approaching the 'Attitudes' - you normally see a lot of action there too. Like Brex said, there are shuttles running constantly - it is a huge facility. Should be a good weekend - looking forward to it.