Welcome Boris , and may i wish many years of good flying to you here in SA once again :)
I have all the maps in hard copy you are after and can give you some support about PHG around Mount barker and south to Strathalbyn , where as you know SDFC ( southern districts flying club ) members operate , all disciplines too , however powered harnesses are rare ,
Around Mount Barker you would be wise to operate under 2500 feet, and South east of MB under 4500 there are a few no go zones but a map will define those for you , I recommend you buy a VTC chart to begin with this will probably be enough for your initial introduction
Hang gliding ? aerotow is rare to non existent hence the migration to the eastern states , car ground tow days are organized by a very few people these days and mostly are posted on this forum , foot launch remains the most popular
You are an advanced pilot and so therefore our smaller coastal sites are for gooning with your single surface , however , jervis to ladybay and tunk offer coastal and inland opportunities more suited to your Litespeed
XC north of adelaide you really need to just hang out with the keen few crew who still foot launch and ground tow at various sites
Our site guide is a valuable source of information for you but you can't beat word of mouth
To others I can recommend Boris as a friendly keen chap worthy to be included in any social flying disciplines , very experienced in XC
Welcome to SA
Cheers steve pap