Last time took over an hour to get onto Expressway after match, any advice on parking 20ish mins walk from ground for easier getaway after?
You could always leave the game early... Personally, I always prefer using the park and ride. Realistically, you aren't going to get to park anywhere decent without a queue on leaving.
My advice would be to park at the University in the City Campus which will cost you £2.00 all day which is donated to charity. From there you could walk to the ground which takes around 20 minutes or if you wanted you could get the metro..
Park up on Wessington Way or Riverside Road & get the park & ride mate. The buses are every few minutes & are free.