Many thanks for all you guys' advice, it's really really helpful
Stargazing & astrophotography is of highest priority of this trip, so clear sky rate is my 1st consideration. Though I would balance between reasonable access & accomodation vs sky quality, mag 22th sky is not critical, as any reasonable dark sky in Australia should definitely well beyond what we can get from Hong Kong. Very slight light pollution or even a faint light dome is still fine I think.
So in additions to Carnarvon or Pilbara area which is very good choices in late July in terms of clear sky rate, any addition suggestions in other part of Australia? So that we may plan other route / activities also. For Carnarvon or Pilbara, we can transit through Perth, stay there for one day for city tour and then go North by flight, or coach.
May I know if there is any public function or star party in that area & time frame?
Thanks also all your advice regarding the wooden telescope parts, so I will go ahead and construct something like this, of course, it's worldwide wisdom, be honest with the custom staffs and I will do that.
http://www.sumerianoptics.com/producten/alkaid/
Last but not the least, feel free to visit me in my robotic observatory in Tibet, in case you travel there. Thanks to the technology & equipment available, now I can remote control my observatory there for programmed imaging work via my hand phone.