Tips for gear
New York is a place where every lenses, from 15mm to the 500mm, can be useful, but it doesn't mean you have to take everything. Know yourself. Your style. And stick to it. Don't try to make an exhaustive shooting, jumping every minute on another lens. Take only your one or two of your favorites. In the first place, if you take more, you need to carry them (and the workshops are physical, in order to give the maximum of opportunities in a short period of time). Secondly, more you shift the lenses during a shooting, less you focus on the subject. Even if the chosen couple is not the perfect one in a special occasion, the fact that you have to move closer or away, that you have to kneel down or to stand on tiptoe, it will give you the energy and the creativity to make something different. Adapt yourself to the subject; it's not the gear to be adapted.
About the body, there is now not a bad camera, only average photographers. You don't need to have the last Nikon or Canon to enjoy these workshops. I've seen sometimes better results with a compact camera than with a pro DSLR. The only workshop worthing a special camera is the “by night” one. Indeed, especially in the helicopter, if your equipment is a slow shutter (like a 24-36 mp) or too light (a compact camera), you will get a lot of burred shots and a lot of disappointments.
Well, it's becoming hard to use it in New York, since they are banned in many places (parks, times square...). If you need a stand, use a monopod, far easier to use.
CARDS AND ROLLS?
Take all your rolls with you or be prepared to make a trip to B&H a day or another (and waste some precious hours). For the memory cards, two solutions: take at least two 32 GB or a portable data storage.
It's not a bad idea at all. You can check your work in the evening, even make a first selection, and share with us your results. I can give as well a course about processing and softwares.
If it's raining, it's a great day for some atmospheric works. It's sunny, great shadows. If it's hazy, great mood. Whatever the weather, it will be a shooting day. You have to adapt yourself to the weather. So: poncho and Gore-tex against the rain, light cotton clothes for the hot day and so on.
Last but not least, get some great walking shoes!