The snacks will help keep you from dozing off. Take some company, too. Traveling to a remote site is great, but don't compromise security. Make sure property owners know where you will be and for how long. Anywhere except down.
Meteors can appear anywhere in the sky at any time.
Most will be swift and faint out of the corner of your eye. Every so often, a real dazzler will split the night, illuminating the landscape like a flash of lightning. These brilliant fireballs can often leave trails lasting several seconds. Pick a site with no trees or buildings nearby so you can monitor all parts of the sky. Speaking from experience, just when you look somewhere other than the sky, that's when a good meteor appears.