Forget multiple exposures and stacking for meteors. They don't work like that. They're visible for fractions of a second, not hours.
A fast and wide lens with high(ish) iso will help with the star trails (the lower the magnification the longer you have before the stars visibly trail). If you have a tracking mount you won't have a problem with trailing, but I'm guessing you don't. A tripod goes without saying, as does the darkest sky as far from light pollutions as you can find. And no cloud! You need to keep the shutter open as the meteors may be anywhere in the sky and at any time. Point wherever you like, keep the shutter open as long as you can until either star trails, sky glow or both become a problem and hope you catch a meteor (or if you're really lucky more than one). You can do in camera NR (mine only does it at ss of longer than 30s, but it's debatable if it's a good idea as it effectively doubles your exposure time and means you have to wait for it to finish before trying another exposure. Have as many charged batteries as you can and keep trying. Good luck.