Steve - I understand it that Dutton NSW will be based for 2 days at Goulburn and the final day at Oran Park this year. As for the actual events to be run you never find out until the day before the event starts (aka - so you can't practise).
Stuart - I usually budget $6K to do each event - or $3K each if you do it as a team (as you should). That includes, entry, tyres, brakes, car prep and accommodation.