Let me start off by saying that I'm very pleased to see this sort of initiative in a school-age guy in the present day and age. You seem to have a pretty good grasp of what you're doing here, and having someone camping nearby is certainly a good idea. These guys have all given great advice, better than I would be able to impart.
One thing I would suggest, though, is to have your mentor that is camping nearby, be within easy hearing distance of a good safety whistle. Since you may want to demonstrate the whistle for your video, set up a pre-decided-upon number of blasts that would signal that you need assistance, just in case. This is of course if you don't plan on having a cellphone, or can't get service there (I don't even get cell service at home here).
I definitely second checking out some of Ray Mears' videos online, as well as Les Stroud (Survivorman) even though you are an Eagle Scout. This pond on the property you'll be on, is it stocked with fish? If so, you might have a fairly easy time of it food-wise. Making your own whittled hook or toggle and cordage is a cinch with some practice, and grubs for bait aren't too hard to find. Of course, four days without food isn't going to kill you, as long as you have plenty of water and a way to purify it.
I'm in GA too, about 45 minutes north of Columbus. I live back in the woods, so I have lots of opportunity to practice stuff, though I'm pretty low on experience still. I was actually thinking about a similar trip soon, heading back onto my neighbor's property and roughing it for a few nights with only the bare essentials. Minus the video camera, of course. And LittleHairyApe, the cottonmouths (we call 'em water moccasins for the most part down here) don't bother you unless you bother them, same as most snakes. I sat and watched one for about ten minutes the other day, in fact. He was coiled up on the creek bank enjoying the quiet, same as me. It's the copperheads you have to watch out for. Those rascals are territorial as all get out. There aren't as many of them around, fortunately.
I have to agree about the mosquitoes, though, and the humidity, and the chiggers... They at least aren't too bad in the winter, but in the summer those little nuisances will eat your feet up something fierce.
Anyway, I'm getting off track. Best of luck, Zach, and hope you do well on your senior project! If you ever want to talk woods with a fellow Georgian, shoot me an email sometime.