Metro is running to Pelaw, but Heworth Interchange is your best bet for replacement buses.
The problem you’ve got is that the current ground isn’t in South Shields (if like me you went to that tie fifty years ago it’s a different venue), it’s in the middle of Bede Trading Estate between Shields and Jarrow. My mate reckons you’ll find a parking spot somewhere near. One of the guys I’m going with has a disabled parking badge, so that’s what we’ll be doing.