The best you can hope is integrity and security until your information reaches the destination but to assume that Apple or the U.S government cannot decipher the information you sent it or use it against you(i.e. set a person of interest as "landmark" and find out who's iPhone matches that "landmark) you must be foolish.

It's no longer a conspiracy. I think we are all over past that time(i.e with Snowden and Wikileaks). We live in a surveillance world and "They're guarding all the doors and holding all the keys".