...a better placed footbridge Wilston station would be a significantly shorter walk.
I've walked from Ascot train station to Ascot Racecourse with a lot of well dressed Poms for a mid-week race meeting, official distance is 800m and it's listed as a seven minute stroll. Wilston station to Ballymore's about 500m and a straight, easy walk, it's a no-brainer.
A 500ish metre walk for spectators isn't a big ask. Many people walk from the Brisbane CBD to Suncorp, as others do from the Melbourne CBD to AAMI/MCG. There's always a trail of spectators from and to Central Station for Sydney sporting events at Moore Park, that's at least 1.5km (alleviated by lots of pubs...).
What happened to the old bridge across Enoggera Creek on the north-west corner? It would've run straight down from Murray Street. Very handy for Jeeps supporters to go back to their Finsbury club house on match days. There was a bridge, there should be a bridge.
BUILD THE WILSTON STATION/ENOGGERA CREEK BRIDGE, NOW!