The race is often less than 500 miles. Sometimes you need to go pretty slow even in a truck. It's possible it could complete the entire race on its own battery. You just bring a mobile supercharger and charge it up for a few minutes at a time at each of the pit stops. You might only need to have...
I film the Baja 1000 every year (and it's awesome) ... That could be a problem for the bikes... The motorcycles move out of the way when they hear a trophy truck. We'll... actually... now that I think about it they have a device called a Stella that will beep so they will know they are coming...