I don't know if this rule is world-wide, but in the US, you are not allowed to have a SAG vehicle.
Article 7
Each rider must be self sufficient. No follow cars or support of any kind are permitted on the course. Personal support is only allowed at checkpoints. Any violation of this requirement will result in immediate disqualification.
Riders do not have to be seriously sleep deprived- there is ample time allowed for rest.
Nanci
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"...I'm like the cycling version of the guy in Flowers for Algernon." Mike Magnuson