Just do it. I remember the first time I went, arriving on the camp site and the engine noise of the cars out on a practise session making the hairs stand up on the back of my neck. It is a very special place/event.
I’ve been a few times since – our routine is to travel down on the Thursday, via the tunnel, and stick to the motorway. It’s not quite as good for car spotting, but a lot quicker than going the old A / B road route. Stop in Calais to stock up on beer. Set up camp late afternoon, start drinking.
Friday – pit lane walk, then take a tram into Le Mans and spend the day there, see the drivers parade.
Saturday, watch the classics, then find a good spot for the start, maybe watch the band in the evening (the Stranglers were good one year I seem to remember,) see how long you can stay awake, try to sneak into the grandstand on the start finish straight in the middle of the night.
Sunday morning, take the car down to Arnage and watch from there for a bit. Back to the camp site, pack up and make a speedy exit to beat some of the traffic the second the race has finished. Drive to Honfleur and stay overnight there (great restaurants).
Monday, leisurely drive back to Calais, tunnel, then home.
God I wish I was going this year!
The Classic is good too, slightly less rammed – more access to the cars and good viewing spots.
Ear plugs are a must, as are wet wipes if you can’t be bothered to queue for a shower. Don’t bother trying to compete with the ‘professional’ campers with their cinemas, swimming pools etc, just take what you need. I’ve never had anything nicked, but try to avoid being there on Monday as the sites get stripped by pikeys who will take anything lying around.