...............I think you are mistaken on this point. The dockers clock stands at the river entrance to Salisbury Dock ,completely surrounded by water.
As for the car park between the stadium and the river ,this is surely a non-starter . Matchday access would be almost impossible. There wouldn't be much room anyway due to the channnel that has to be maintained between the docks .
Apart from anything else, why would you block out the main point about being by the river both from views looking at the waterfront and also views from inside the stadium.