There are several options.
From memory for £55.00 you get to park in the paddock on the Sunday with all passengers, have a programme and have two separate runs up the hill.
Alternatively, for £20 on the Saturday, you can partake in the Cotswold scenic drive which finishes at the Cotswold Hub.
The other option is just to park in the spectator/public car park on the Sunday, where I believe entry is £15 per car.
If you pm me your e-mail, I can e-mail you the entry details.