Make your pack as light as possible and then lighten up more, take plenty of water and purification tablets, get your pack adjusted right, don't forget to carry the t.p., pack an extra pair of glasses, get in shape and when you get there . . . slow down!
If you haven't got a light but steady tripod you'll have a hard time seeing much of anything. Make sure you know how to use your gps. Wardens and biologists are usually willing to talk and can be very helpful, as can taxidermists. Get a merino base layer and socks.