tdod101, some good info here, stick with what you have and what you are comfortable with for your first hunt. If you wish to change optics, definitely stick with lower power for "bush" hunting. Talk to the guys you are with, who have previously hunted this property you are on. If they see lots of deer every year, you don't have to drop the first one you see. One thing hunting Manitoulin has done for me is taught me to be a patient and calm deer hunter. If you are lucky enough (depending on your area) you can watch several deer before picking one to shoot. Watch them in your binos, pick you shots, picture making the shot and let them walk off. When you see one you really want, then you will be calm and have no problem making a perfect shot. Don't get fancy picking head shots or neck shots, just stick to behind the front shoulder. They may run off, but they will be laying within 50 yards.
Unless a big monster buck walks into your cut first thing Monday morning, then everything I said goes out the window. LOL Try to keep calm, (good luck) and make your shot. That's the best part of hunting, the excitement, that and deer camp life.