Franky,
Oh, another thing about starting at Delaware Water Gap headed southbound: the rocks! That is a brutal way to start. Unless you've recently done a multi-day backpack with a full pack through this section and know that you can comfortably handle it, best to save it for when you have more miles and experience (and maybe a lighter pack).
While the rocks can be very annoying and trying for someone who's been on the trail for weeks or months, for someone just starting out, it's worse. The PA rocks can be especially rough on your knees before your body has adjusted and you've gained your trail legs.
Also, your pack may be at its heaviest when you're just starting out if you're not experienced. Most hikers learn to trim their pack weight over time, as well as pack their backpacks so the weight is closer to their center of gravity, and they can balance themselves better on the rocks.