Yes still applies Slice - the orientation of the mt lofty ranges still would do that to the skies above you re the prevailing winds. the only tricky thing about MB would be Lake Alexandrina and the river causing morning fog/mist as you say- and from experience, it translates all the way up the ranges on the mid to eastern side. Just the lack of cloud is worth it as far as astronomy goes - the Murray can cause a few problems if you get to close re morning mist. but then the hills can produce their own sort of localised cloud/fog of course - its not always perfect
