Why such an elaborate grounding system? My approach is the opposite. I do not ground my equipment. As far as I can reason there is no need too. Outlets are grounded and the lightening and RF grounding takes place outside. That's all there is too grounding. I've never had any issues or encountered any problems. If someone thinks I'm missing some type of grounding concept then by all means say your peace. I'm always willing to listen.
First, there is more than one type of ground for radio work. The ground on the house electrical system is a safety ground ONLY. It isn't a RF ground nor a lightning protection ground. Keep in mind that the NEC does demand that no matter what type ground it is, all grounds 'serving' a building must be bonded together.
True, if your antenna system is properly constructed or of certain types, you may not need a RF ground. But if you do, that ground must be bonded to the house electrical ground.
If the antenna system is surrounded by taller structures or natural terrain, you may not need a lightning ground either--but it's still a good idea to have one. Not only does that type ground provide limited protection from a direct lightning strike, it also provides protection from transient surges--which the antenna may pick up from a nearby lightning strike. A lightning strike produces high amounts of RF energy--which is what an antenna system is designed to pick up!
Consider too that static electricity is generated by the simple fact of wind blowing by an antenna structure, and the ground connection will prevent that from entering your shack through the incoming antenna leads as well.
The more ground rods, the more the transient charges picked up by the antenna will be shunted away from your equipment, and the more protection you will have for that equipment. Since that RF energy does have voltage behind it, that ground system must also be bonded to the house electrical ground for the safety of anyone in the house.
If it isn't, you may become that 'bond' simply by touching your equipment while you're in contact with anything else that is connected to the house electrical system. At that point, you may well cease worrying--about anything!
In short, the more ground rods, the more energy that can be dissipated BEFORE it enters your shack/home, and the safer you will be from unexpected weather changes. It also follows that if you have NO grounding of your antenna system, any static electrical charges will drain right through your equipment. If you hear static sometimes while operating with such an antenna system, that is why.
Whatever you do, good luck and 73.