No sign of him so far!
Nige, you could try sending a Private Message to Gilles (see list of Club Arnage site members). He works in the tourism industry in Le Mans and knows everything there is to know about this sort of thing. He's normally so helpful!
Generally, hotels are massively expensive, the price often raised by about ten times usual rates and you need to book for the week etc. Unless you strike it lucky with Formule 1 Hotel, expect to pay a four figure sum.
Alternatively, you can do what I did; buy an old campervan. I got sick of tent camping after the great deluge of 2001. It's a great compromise. If you buy a pre-73 classic, there's no annual road tax to pay and classic insurance fully comp is about £90 pa. Then you get all the fun and atmos of the campsite too and the frisson of exitement wondering wether you'll get there without breaking down.
I'd be happy to point you in the right direction as to where such an excellent and roadworthy vehicle could be purchased for under £500. Provided you don't mind driving a Commer, Austin, Thames, Bedford etc.