It's a little surprising that sag wagons would ride ahead of the cyclists to get to the campsite.
It surely would be nice if the camp and food was all set up and ready to go.
But if I was in the cyclist's group, I would prefer that the sag wagon was behind me, just in case I lost every ounce of energy, or I or someone else was injured or whatever. But I guess you would know the procedure ahead of time and could just look for another tour group.
It sounds like fun, though.