A lot of people ask us about going to the major attractions with their dogs, we were at Eden last week and noted that they have put up these bays for dog owners. Basically its just just shaded car parking slots so your car doesn't get to warm while you're inside.
If you haven't been before you need to spend about 3 hours there to get a proper feel for the place. You could do it quicker if you don't stop for a meal etc but you could also be there a lot longer if you read everything and try and absorb the whole concept. The dog bays are near the entrance so you could always pop back.