For the VSF guys and girls working at RAF Halton for the Olympics, there is plenty of space for cars. For those using the place to stage for their RSOI en-route to other locations, there is no room. There is also no capacity for large numbers of one-way hire cars.
If you don't believe me, then get a hold of the RAF Joining Instruction via CMLO for the VSF Trg School and there is a specific section on transport - it clearly states that individuals will be able to park on station, but you may be parked 1km from your Barrack Block.
LJ