Yeah I went to a few of them in the late 90's. They stopped the shows due to the bridge being weak for cars. I wonder if it has been replaced.
My earliest photos are from 2002:- https://www.solent-renegades.co.uk/media/albums/gosport-fort-brockhurst-2002.349/
Some from 2003 too:- https://www.solent-renegades.co.uk/media/albums/gosport-fort-brockhurst-2003.350/
Its a nice venue, looking forward to being a part of that show again.