Our group did the same on the way there too.
Train to Victoria, in the pub and then the reverse of the route I said back, in The Green Man for a few massively overpriced beers and then to Wembley. Travel wasn't too bad in all honesty, only problem was having to run for the train home after...
That was actually the quickest way to and from Wembley to Victoria. Jubilee has too many stops for the first part of the journey so Metropolitan to Baker Street, Jubilee to Green Park and then Victoria line to Victoria was the best way back.
Got to the station for about 20:10 using that route.