Shadrack campground has full hookups and they are just up the street, about 8/10ths of a mile, from the track. Pretty sure you could walk it but there are shuttles everywhere on race days. I'd call them early as possible though. You may have to pay for the whole week but its worth it IMO to have sewer hookup. There are several places to camp around the track that don't offer any hook ups at all... If you don't mind dry camping. I'd rather pay more for a level spot with full amenities, but that's just me. There are also a couple of places directly across the street from the track but I'm not sure of the name. You might call the track and see if they know who owns them.
Lakeview RV Park is a bit further from the track but still on hwy 11E ( the same road the track is on). They probably offer shuttle service to the track too. And as Dennis said, The dragstrip campground is right there on the grounds.
The spring race has been moved to April 19th. You should come to it too! :)