I was mostly just guesstimating. Its forest, and 1/3 of my time would be screwing around.
Maybe I'd start out with 4-5 hours or less sure, sounds good, but still I've gone 4 hours exercise without water, its not pretty but its manageable. I don't see why everyone needs GPS's and fancy gizmo's. I would fancy trying my luck with a fat bag of trail mix, a half gallon of water, and an energy drink for food. I would bring pocket knife and blade knife, maybe a machete, theres lots of trees.
But honestly as a kid, I would explore the woods like crazy, but its just scary the farther you go out. Same with the ocean. My main concern is big animals and stuff, I am pretty cautious when it comes to not dieing by a stick falling on me, or falling myself or any everyday risk I take walking down the sidewalk, the woods isn't that different.
Yes I would definitely need a map and compass, I know that for sure. Maybe I should get a dog? They make a good companion when all your friends are feeling too lazy.
I'm sure I could build myself a backpack for $1000 or less to survive in the woods forever (assuming the authorities wouldn't screw with me), because as an animal/organism of earth you have the genetics to survive off the land without money/help. So a walk in the woods shouldn't be that hard right?
Don't worry, I'm not gonna be like those few people that claim to be a crazy natureman, then go into the woods and die from starvation or hypothermia.