If you are staying overnight - a few days ago there was only a single room left at the Sharnbrook (but check) there is a list of alternative hotels in the area posted in the last Mag
If you wish to attend the Gala Evening Dinner on the Saturday night, you will need to do that via the Sharnbrook Hotel.
Provisional information - CCCUK members pay £10 per car for entry to the Nats, irrespective of whether you visit for one day or whole weekend. Other American cars and visitors will pay £5 per person per day - and yes, you can just turn-up on the day - make sure you have your membership card with you. CCCUK cruise-out on Saturday morning will be to Santa Pod where we will have a dedicated parking area, be able to watch some of the RWYB drag racing and members can compete if they wish. More information to follow.