if you want true black sky in the USA. the best if the only place left is black rock desert in the north west corner of nevada.
https://en.wikipedia.org/wiki/Black_Rock_Desert
bring twice the fuel, twice the food, and four times the water you think you might need.
and more than one motor vehicle. no cell here. might get ham. or a sat phone, but nothing else.
get all before leaving fallon nevada. as the ONLY place to get anything north of hwy 80 is the burg of gerlatch. and they have almost nothing.
get out on the playa, and drive north a couple hrs you are over the curve of the earth from everything. if you did not bring it... it just does not exist.
and watch out on the rd north to and south home, as you cross tribal land, and yes they do have speed traps, (only source of income).