One fascinating aspect of these rovers which I learned from Asif Siddiqi's Challenge to Apollo
is that they had a heritage dating to very early plans for cosmonauts on the Moon. One mission design called for landing a supply cache and perhaps even emergency return vehicle before the crew. Cosmonaut lands, rover is waiting for him to hop on, fasten seat belt and head to the other vehicle. (This was one of many concepts, of course- "powerpoint engineering" used to be called "viewgraph engineering").