I went last year but not going this year. The one across the street from the train station is ok and they'll let you in. Didn't see much else of the place because from there it's a 2/3mile walk through a big industrial estate to the ground.
I've done wigan a few times and will be going again on the 19th. Always gone to the Red Robin - it's near the ground and very away friendly. Are you getting the train from Scotland? I'm coming down from Glasgow early doors on the Sunday.