I call the above clip the Nitty Gritty. If you've been following along and perhaps even revamping your external frame, today is the day we put it all together.
It can get a little strange at first, making sure everything is secure, will carry well and fits. Silnylon is slippery, so having the main bag full creates a ledge for the top bag to rest on. This helps when cinching it down.
As you can see in the video, my tent is in a long skinny bag. This helps keep things on as well. If you want, you can add the anchoring loops in the long seam as well to pass the cinching straps through.
You can use bags that are not necessarily waterproof. Just be prepared to cover with a pack cover. You can get ultralight silnylon pack covers at Campmor for a very reasonable price.
Even if all you bags are waterproof, pack covers are recommended. Those three day rains on the Appalachian Trail have a way of soaking everything unless you seriously compensate. I always line the stuff sack which will contain the sleeping bag and sleeping clothes with a plastic bag.
Its good to have this project completed. Write me if you have any questions.