I just finished reading "A Man on the Moon" by Andrew Chaikin, an amazing read. For the missions involving the Lunar Roving Vehicle (LRV, Apollo 15-17), there are some mentions of astronauts reporting on the traversability of the terrain and how it compared with predictions from mission planners: more (small) craters than expected, less boulders, etc.
Were there backup traverses planned for these missions? For instance, if one or a few waypoints/stations could not be reached due to undrivable terrain, were there other/alternate routes prepared? And if so, are they documented anywhere?