Yes, exactly. If you're going by rail, best bet seems to be to take the Metropolitan line from wherever you decide to get on it up to Watford, then an approx. 20min walk to the ground, which looking on Google Streetview, I've yet to find a pub en-route...
Think we'll risk a similar option too. Car looks simple enough until you hit an A3/M3/A30/M4/M40 Saturday nightmare. Tube might not seem so bad afterall with polite chat and a flask of coffee to share.
According to National Rail this route is effected and there are no trains from Willesden Junc. to Watford. There is a replacement bus between Harrow&Wealdstone and Watford.