Hmmm... that changes my opinion. In light of the fact that it's only a one day ride, I might consider it.

Let's see... you could start maybe a half hour before daybreak to buy you some time (so long as you're properly lighted and all ), plan on taking a short lunch break (15-20 min), and barring any major mechanical catastrophes, still make it to the end by nightfall. That would leave you 5 min. here and there to stop and take a break if need be (you could take 5-6 short breaks throughout the day for "natural breaks" and the like).

Knowing it's not a multi day ride, it might be more in the "doable" catagory. I was thinking it was 132 miles a day in those conditions for a few days. I would get too tired to make the light restrictions after the first day.

I think perhaps I'd consider it (if it were me- and it's not- so my opinion is moot).

Of course, I still think there should be someone following the riders in a vehicle along the route. It's just playing roulette to assume that nobody will need a lift, or get hurt, or have a bike just totally give out (and a distance that far would cost a yearly wage in taxi fares).