Another trip could bring heavy lunar adapted bulldozers.
Craig Davidson gave a talk in 2017 about Improving the SpaceX Mars Colonization Plans.
Make a moon capable bulldozer. Replace steel with titanium-aluminum alloy. Use electric battery technology and solar panels.
Astrobotic developed Polaris as an excavation vehicle that could serve as a robotic precursor to future human planetary colonization efforts by preparing terrain and mining ice and other volatiles.