It might be hard to get a whole lot of quality scientific instrumentation onto something that needs to "hop" around on an uneven surface. It might be nice to have a swarm of hoppers and just let them hop around up there checking things out as an exploratory wave. Then maybe they could call for a rover if a more detailed test were needed.
The best way to cover distance though is by air, so I always thought that in a low gravity environment like Mars they might be able to build some type of mini-blimp with fan drives and solar power and have it carry all the instrumentation. It would have to moor itself during wind storms, but they might be able to figure out a way to do that somehow.
Something like the probes depicted in this CGI documentary: