I think Chelsea fans would be more likely to go to Stamford Bridge than Staines, likewise Arsenal fans would be more likely to go to the Emirates than Borehamwood. They're not even in London ffs!
That may change when Staplewood is completed, because I believe they are putting in a stand. Parking may be an issue though.
There wasn't a lot of room for vehicles but surely lack that would be structured into the plans for the future.
Parking at Staplewood was one of the rare concerns raised by locals...apparently there had been an issue of people parking in the road. As you say, has probably been dealt with.