There is temporary camping at Les Combes for the 24 hour race.
My slight concern about LMS is that it's a smaller event and it's early in the year and I wonder if all of the camping areas will be open? It might also be frigging nasty weather!
I don't think we've every camped for LMS, last time I went it was later in the year I think and last time KK went it was awful weather, very cold and very wet - can't remember which year and what time of year though?