Over here in Belgium I know several clubs who do off-road endurance-competitions.
TopRacingClub in Waterloo (
http://users.skynet.be/topracingclub/) (French speaking).
If I recall well, this is the format:
Team consists of several drivers and one car (only one chassis alowed but as many spare-parst as you want). They drive for 3 hours, then the cars go into a "parc fermée" and there is a pause with big BBQ for everyone. After this BBQ, the parc fermée gets open, and the cars restart for three hours.
I recall also that the team that won last year used Lipo (offcourse) and a special BL-motor (Cyclon 4000 sensorless, I think it's an airplane-BL) which lasted easely for the 6 hours-run. ESC was a GM Genius 80
I also know, some teams just bought an older Losi 2WD for this race, knowing it would be ready for the bin afterwarts anyway.
Then there are the endurance-competitions of ATR at Stokrooie, next to Hasselt. (GREAT new track, see pictures in this thread:
http://www.modelbouwforum.nl/forums/...ck-layout.html)
These competitions are driven over 3 hours in the evening so partly under darker conditions.
A team needs a minimum of three drivers, and every driver uses his own car. So all that has to be switched is the transonder. Three drivers: one driving, second as marschal, thirth one preparing his car.
They do this more then once in september-october and the ambiance is always great.
I'm defenitly interested in endurance and will certainly try to participate. I'm also conviced that this could be very good training.