I am by no means a good street photographer - but I do occasionally like to shoot it. I dont like to do what Bruce suggests above because I like unstaged, raw street photos - but what Bruce suggests will work, you just wont have "Natural" photos if you ask as people will pose for it.
The other way (my way) is a bit more sneaky. It is by no means a definitive "guide" and I am only suggesting, what <<i>> do - you can do it any way you wish - its <<your>> photography, but it might throw you some ideas
First rule - dont photograph kids or point your camera anywhere near the young people. If you get caught, it could end up being a whole load of trouble - no matter how innocent your photographs might be. Theres nothing like an angry mob wanting blood over kiddy photos.
Take photos as if you were a tourist, then have the camera hanging around your neck, maybe a wired-remote trigger in your pocket. Have a nice wide lens (24mm or less), set focus to infinity, F stop around F11 so you're getting most if not everything in focus. Set lens to manual focus or auto-focus on all points. Shutterspeed of 200 is plenty.
Set ISO to auto as you dont want to be fiddling around with your camera. Have the camera strap tightened so its just below your chin. When you want to fire off some shots, just do it and look somewhere else - blend in as a tourist. When you genuinely want to get a photo, bring it up and shoot like you would normally, but you can get lots of natural photos just shooting as you walk around. Here are a few of mine just to give you an idea. Your keeper rate may be low, do not worry about it, out of a few hundred shots, I got 10 that I actually liked, most will need straightening as you cannot tell if your shots are level but it doesnt really matter. You will no doubt cut off heads/legs. Practice at home first. Some people shoot from the hip, Im not good at that and it may be that you're GREAT at that, so do a bit of googling of shooting-from-the-hip.
It is a great subject to photograph - markets/events (like the one you are going to visit) are a great way of blending in without being noticed. Just try not to shoot photos of kids - they do the craziest things and they are usually the best subjects - but for your own safety and the paranoia of the public, just try to avoid if you can. Good Luck and I look forward to seeing some threads of yours with your SP !