That I think a good long trip wth a great big expedition to luna is in order.
The corrosive nature of dust is not well understood.
The possible chemical reaction rates of the dust when oozed into suit joints is not clear at all.
I think we will end up with clamshell suits that mate to the rover or lander or habitat and are exited via the rear, never actually coming into the ship, but instead staying in a protected "garage" or "carport".
(Thanks to Nick for this idea).
The dust is ubiqtuous and dangerous.
The interesting thing would be to know if at places where the seasonal cryoclatic events are happening, will there be nasty chemicals that eat spacesuit parts or other expensive and precious things we would like to keep?
How many hours of life will a suit actually have before needing to be scrapped or maintained? How in the hell to do that when it will be deeply impregnated with fine cutting dust?
With nuke powerplants on Mars, we could run good seperating units to mine for O2 and other volatiles.
But nuke is heavy.
So luna offers us a way to get more payload on the surface for less money, since a large amount of travel time consumables are not needed.
Surely we don't think seriously that six manned landings and a few landers and orbital probes have worn out the interesting things to do on a an area the size of Africa? While we are exploring and sciencing, we can do a lot of equipment testing, to build a baseline to modify successfully for Mars.
Ed