I'll be there as well with my M3W with Bell & Covill by the Jackie Stewart pavillion at the start of the pit lane:)
The organic breakfast vans are good or the full English is available from the Aero Cafe.
It'll be fairly busy but there will be plenty to see and the approach roads over the South Downs are great fun.
As RogG says watch your speed through the villages as you get close - particulalry as you leave.