Thanks to Tim Roberts (no relation) and Meg Gordon for their help with this.
This map shows a number of contiguous reserves managed by Ipswich City Council (ICC) and (we think) the Queensland Government Department of Environment and Heritage Protection. The open area at the northern tip used to be a gravel quarry; ICC plans to develop it for recreation, but the area gets inundated and sometimes scoured during flood events.
The darker green on this map shows one of the few remaining areas of Rainforest on the Brisbane River. There are known to be overgrown trails in there and part of the ICC plan is to open them up through to Camerons Scrub.
Update: the latest version of this map includes substantial additional Council reserve identified at the SE corner.Sapling Pocket