I actually suggested this/asked about it and was told that Regent would not (could not?) tell guests what tours to select and all too often book tours inappropriate for their capabilities, thus slowing down most of the group. This has happened to us too many times to count. Yes, some day we may have physical limitations but would not book excursions beyond our abilities. And we do know of some that never get off for excursions - they know their limitations and know it would simply be too taxing for them.