And tbh the effort and expense probably wouldn't be worth it
Likely doing that would require taking up the road, regrading everything, widening the area around the road, putting in safety precautions, likely build a new road for maintenance access to the park.
That doesn't even get into the infrastructure for electrical, storm water management, emergency access, the new 'toll' plaza that would be needed.
And it's not just that road, all of the entrance to KD of Kings Dominion Boulevard and Theme Park way would need to be completely reworked to handle the new flow with turn lanes, entrance, exit, ability to handle backups.
And then on top of that you got to think of the on going costs of maintaining that, the staffing of the new parking plaza, the additional security you need for the extra lot, and the people you would need to maybe direct traffic.
Like I said, that's why WoF/OoF isn't really a great example, they have a natural advantage to having two gates, two parking lots, and the internal pass through. KD doesn't have that so to build on your own is wildly expensive and not really worth it in the end.
If,
if, they were ever to do something like this I would say that the plan should be to put a hotel/resort back there of their own and try to make KD more a destination, then using that land and spending the money to access that area back there makes sense. The only other way is to do what I said and get Doswell to pitch in with using local roads to access that area so that way the work they need to spend money alone on would be reduced.
