I have a Canon 30D (a bit larger/heavier than your Nikon) and brought it with me to India, Turkey and Greece for almost two months. I will also be bringing it with me again when I go back to India next week. The only thing that bothered me about it was that the damn thing was heavy!
People are probably going to stare whether or not you have a camera with you. If you're really that worried about becoming a target while carrying it, well, I'd suggest a good long day wandering around your own city taking pictures to get a feel for how skeeved out it makes you. My guess is you'll be surprised at how much it's so not a big deal. Also, a discreet but functional camera bag can make all the difference.
You bought this camera for a reason, right? Don't let the fear of what could possibly happen stop you from taking advantage of fantastic photographic opportunities. (Also keep in mind that tons of professional photographers are always traveling all around the world with equipment that you'd need to take out a mortgage to finance.) You will not regret bringing it, but I would bet next month's salary that you WOULD regret NOT bringing it!