If you stick to Motorways then fuel is available both on card and cash..
Off the motorways we found that many of the stations are card only!!
There are plenty of Petrol stations around Lemans to fill up with before returning.
Download the Club Arnage guide as it gives you some valuable information.
Remember a FM radio, as radio Lemans is invaluable in keeping up to date with what's going on throughout the race!
For me the road trip is a much a part as the race, if you have the time, take the long way down and enjoy the other car enthusiasts on the route- the French love to see sports cars- the Police love to see them driven too fast even more so! 130kph dry with headlamps on.
If you go as a group of cars it does add to the weekend. All other European driving rules apply, which I'm sure you have sorted...
Realise where the events happen away from the circuit- the concerts, pitwalks, drivers parade, whilst these aren't the highlights for some - they do all add to the overall experience and helps you realise why its the greatest race on Earth
Prices are higher than normal, £5 for a cold beer etc.. food is all £10 etc you know your budget so work it out from there...