There may be a small car park at the station - there's definitely one in the middle of Stanmore - but it will cost a bit to park there. There's quite a bit of street parking there so you should be OK.

Make sure you check the Transport for London site just in case they are digging the line up or something - they usually do it at the most inappropriate times.

And good luck - I look forward to Brentford getting 6 easy points next season!