I shoot with this combo too, it is amazing but it will test your resolve after a while. All of these are great, the first one will grab and hold you till you see the rest, great work.
The security guys are the biggest a-hole usually. Most don't even know their own policies on stuff and just tell you to leave. You are not hurting or distracting anyone and as long as you don't have a tripod or light stand on the ground, you should be good to go. What is worse when you are on public property and they tell you that you can't take pictures of the building (mostly government buildings).
Beautiful images. Love #1 the best. What I really like about this set besides what everyone has already mentioned (lighting etc), is that you captured the character of this lovely young lady.
Wow Impressed by the image quality at such a high ISO!