Sounds like the park is a goa!!
For a course i did a couple of yrs ago at Uni i had to plan a walk up Mt Barney and execute it! Had an awesome time and ever since have wanted to go back and do a camp and more bushwalking/photography/driving/exploring. So if there is a weekend or week planned out of this trip out to the Springs, i would like to involve a stop off at Mt Barney and Mt Lindsay to have a look around. Surely there are some good public tracks around that area.
Just a thought