Does anybody know how I reach the Camp MCCarran Control Tower, I'm frustrated.

enter mccarran, then enter throught the garage doors to the mccarran building.. then go straight through the garage doors right in front of you, on the first floor.

go to the metal doors at the back of the place where u talk to hsu. then u just go to the right and unlock the door via computer at the left

You obviously haven't looked everywhere or you would have found it