Re: Not optimal ...
Solar wind blows dust on the moon. It was found, and unexplainable for a while, by the Apollo teams. I don't recall if it was enough to be a problem or not though. Plus things WILL blow it around if you are landing/launching from it (though a rail gun may solve this).
DV visual:
https://xkcd.com/681_large/
http://i.imgur.com/SqdzxzF.png
Getting to the moon first would save 20-25% of your DV budget... but you cannot use aero capture, so end up using that landing stuff to have to relaunch it. If launching fuel and instead doing a flyby with the crew, you're not landing and relaunching that part, but your transfer vehicle and fuel delivery system need to use less than that 20-25% DV budget.
In KSP it is better to launch straight to a destination, use cycler craft or launch from orbit than it is to use a moon as a transfer point. They only use them for fun or if re-using large facilities, where landing gives your R&D gains etc.
Apologies for my post above, last time I post on the phone. ;)
Biting the hand that feeds IT
