Yes, it is hard to do it unsupported, but it is impossible to do it with support. Do you recall any pilot in the whole history of Icarus Trophy who had his partner driving a camper along the route ever fly a route this long to the finish line? In fact, it was not their fault at all! While good sleep in a camper may seem like a great idea, it is exactly the opposite. Spooning your partner in a warm bed would make it impossible for you to get up before sunrise again and again. 

You have to do it on your own because that is the only way. And in the end, you will feel like a hero because you will become a hero.