Get there early as the parking gets rammed.
Also as it is so big, my advice would be to make a list of the 'Must See' things that you want to see/do whilst there and then tick them off as you go along. After that you can then bimble around and have a mooch around everything else.
If you want to stop and have some lunch do that early too as the places to eat get really rammed too. We went outside the showrooms to the outer concourse and found a sandwich place there which was less crammed so were able to get a seat.
It is a big day out!
Graham :smile2: