Thank you very much you all!!
I really appreciate.
Now I have several good sites recommended, local informations, and I learned that there is measure called SQM, and also general average climate in July in Australia, thanks very much. All really helps.
but I just can't make up where I should go.
In my country it is very small, and if you aren't particular places, you won't see any star (except perhaps venus?) . So maybe I thought things through in my country's way. (Australia very big!!)
I mentioned these already, but let me sum up in few lines.
I go Australia in July, flying 10 hours, paying about 1000 AUD, spending all my 2017 holidays from work. I already have plans visiting Cairns & Brisbane. I have around 3~4 days for my plan for both star-gazing & outback road-trip (probably renting campervan. So I don't mind being far away from city, unless very far to drive. if it makes very good star-gazing I can travel by flight also if it's worth my money) My object is to watch core of milky way clearly and realize how many stars there are! (i'll be bringing my safari binocular)
Joe gave me very detailed advice, and so I'm considering either no. 1 or 2, as he/she suggested. but your opinion considering my circumstances?
1) Just drive to southwest for Outback from carins (sites such as undara lave tube as given)
2) fly to darwin & head south for Outback (sites such as katherine) (Return flight from carins seems to be around 400 AUD)
3) Your choice? (Uluru or anywhere)