Jeez, you lot really are fooked whne you leave that sleepy little hamlet of yours aren't you?
75,000 get to the ground week in week out to watch Utd games without too much hassle you just need to use a bit of common sense. If you're getting the tram from town either get on at Piccadilly Train station or Piccadilly Gardens. The Mosley Street stop has gone now but if you try getting on at St Peters Square or Deansgate you've got feck all chance of getting on. Alternatively, if you're boozing in the Printworks area get the East Didsbury tram from Shudehill. You'll need to get off at Trafford Bar but for the sake of an 15 minute walk it's worth it. Otherwise, there are 3/4 bars at Salford Quays (Chiquitos etc) which tend to be popular on match days but you'll need to catch the Eccles tram to get there. It's a 15-20 minute walk to the ground.
After the game I'd recommend going for a couple of pints down at the Lowry complex and wait for all the crowds to disperse. There's Lime Bar and The Beefeater which shouldn't be too busy.