These are incredible! I don't have the FF body you have but my D7000 will be sporting that lens next trip
I really love night and low light photography so the shots in your gallery are of particular appeal to me. Your fireworks photos are incredible! Did you have anyone with you to 'guard' your tripod legs from being accidentally kicked? It's the one thing that kept me pinned to railings last year rather than braving Main Street out in the open.
Also, one more question, did you use a neutral density filter? Sorry about all the questions. If I didn't like the pics I wouldn't be asking