Drive over the day before. Stay in a B&B type place in the village, do some beers, do the track day, have some more beers, drive back (or on elsewhere if you want).
Is there be any chance of tying the dates in with the TVR continental meeting at Zolder? Would be great to be able to combine these into a single trip.
Not seen a released 2005 calender for public days at the 'ring yet, for SPA dates I feel its really best if you can link to do the two in one trip. So if Spa Thurs for example, then do ring on the following Sat/Sun if its open & even better if can link up to a Fri eve.