Emirets stadium parking?

[MummyNessi]

Heading up to the Emirets stadium today with the kids for a special family friendly football match this evening. They are super excited!
It's about 1h and a half drive from us ( Surrey) and I need to figure out where to park ( preferably a short walk to the stadium)
And maybe something to do for a few hours before near ?
Any advice?
It's the first time we are going up to the arsenal stadium.
Normally if we go to London we go with public transportation but as it will be late for the kids when the match finishes I prefer having the car.