Similar to breadcrumbs, but more certain..
We use a corner marker system - at a turn, the ride leader hand-indicates to the next rider, who then pulls over with indicator on and arm pointing so all following riders make the turn. When tail end Charlie arrives, he/she flicks high beam lights and the rider doing the indicating and pointing pulls out in front of tail end Charlie.
The only time I have seen this method fail is when the indicating rider had some deep urge to get back to the front of the pack and overtook unnecessarily and dangerously - we were all at about the same pace. Note this is one rider out of oodles.
We use a corner marker system - at a turn, the ride leader hand-indicates to the next rider, who then pulls over with indicator on and arm pointing so all following riders make the turn. When tail end Charlie arrives, he/she flicks high beam lights and the rider doing the indicating and pointing pulls out in front of tail end Charlie.
The only time I have seen this method fail is when the indicating rider had some deep urge to get back to the front of the pack and overtook unnecessarily and dangerously - we were all at about the same pace. Note this is one rider out of oodles.