Trevor,
Aside from the latent cannibalistic tendencies of some, worry not - the advice you have had is all good and the offers of assistance reflect a genuine spirit of CA and its members to help those of like mind who are travelling from afar. By and large, whatever you need to survive the week is either available on loan from others, or is cheap enough from the supermarkets to be able to leave it behind without much angst. The key is getting yourself to Le Mans by whatever means, as there are plenty who are willing to pitch in and help by picking you up from the railway station and generally welcoming you to the fold and including you in the proceedings. The circuit campsites are undoubtedly the places to be - what they may lack in facilities (or have in queues for them) is more than compensated for by the proximity to the track, the atmosphere and the social life. Don't bank on sleep or sobriety being priorities though! Good luck with the trip and we'll see you in June,
MG Mark