I've been three times and each time with the splittie to be on show. It's a right royal pain in the arse "making camp" each evening then "breaking camp" again in the morning often too early to make food, navigating through the other campers to get to the display section. On a positive note it gets us back stage passes for everything. We were always told to remove any wine bottles before entering the camp site and to decant into plastic bottles.
My Top tip is to have a go at the rally or driving school and take your own food. Burgers and the like are silly money!