http://science.nasa.gov/headlines/y2007/23nov_flyingmoondust.htm"Particles speeding horizontally at 1.7 kilometers per second will travel literally halfway around the Moon. Boost that speed to 2 kilometers per second, and the projectiles can completely circle the Moon."
So before we get a base going, maybe we should make a landing pad? I would imagine a metallic surface raised up above the lunar surface can be landed on relatively easily and before the spacecraft launches back up, they could perhaps clean off the pad if any dust somehow gets on it.