If you are going to buy anything, wool is always a great bet. But then again, I am from a bit further North.
Check out the local regulations, but a blaze orange baseball cap, a blaze orange watch cap (switch for weather), a blaze orange hunting vest with lots of pockets, some wool socks and a nice pair of boots should work nicely with what ever else you typically wear out in Fall weather. Avoid anything white.
A backpack with a blaze orange handkerchief pinned on its back is also handy for carrying meals, gear and emergency items. The extra gear I carry: Knife, .357 or .44 sidearm, cell phone, compass, matches, mirror, GPS device, batteries, flashlight, signal mirror, lighter, extra knife, rope, spare blaze orange watch cap (good for warming body parts), paper towels (use for TP/sniffles/fire-starting), Snicker bars, water, rubber gloves, poncho, duct tape, plastic leaf bag, .22 pistol, extra ammo. I also usually switch between gloves and choppers - I keep the non-used hand cover in the back of my vest to keep dry.
A good blaze-orange hunting vest, a blaze orange baseball hat and a blaze orange watch cap or two can go a long way with stuff you probably already have.
Leave your gear hanging outside or in the back of you vehicle as long as possible. I usually keep all my gear in the back of my SUV and change outdoors to keep the hunting cabin smells out.