Me and a few mates are doing the same thing we did 2 years ago. Going across from Dover to Ostend (sp??) on the boat on the tuesday, Karting on wednesday at a great local circuit (
), go to Spa on the thursday morning to buy our tickets and get a camping spot in stavelot then enjoy 3 days of superb beer and fantastic racing!
Edit: we usually go for the general admin ticket as it means you're not tied to a seat but can still get a damn good view, especially at the bus stop.