Damn that's a good idea...
Hi All
Nick, that's a good point. I envisaged a heavy fuelling station as you described but the mobile mother rover makes more sense, especially since it doesn't need martian polar ice then - it can use microwaves or solar-concentrators to heat the regolith and catch water from it that way... unlimited refuelling for all the little remote investigators and a home-base that doesn't stay in one boring spot!
Cool.
Adam