What is the source for the hardened bunkers? I looked through GT Starports, and there were only a few comments:
- ... but most downports bury the tankage on a remote corner of their site (preferably in rock), then pump the fuel to individual berths through a system of underground pipes... pg. 72
- Downport fuel processors generally are placed underground, close to the fuel depot. pg. 73
- Aboveground tanks, suitable for small ports and temporary installations, cost MCr0.05less per module. pg 73
In any case, bunker busters and meson strikes. Something else, I never stated in my post that the LHyd storage was above ground.
With grav vehicles, troops can be landed wherever there's a flat space, if they have to be unloaded from a ship at all. Depending on how the invasion forces are equipped, troops will probably leave their troopships in grav APCs and dismount wherever when they need to conduct dismounted operations. It might even be a good idea to land somewhere besides the starport, since it will have been heavily bombarded and possibly trapped or have target reference points for defending forces, in the expectation that the invading forces will concentrate there.