I have a GVP G4 and I use my 3/4 ridgerest as a liner to give the pack form. I pack it like this:
Sleeping bag in stuff sack in the bottom, followed by the Hennessy Hammock. This fills up the bottom completely which makes the hip belt work better. I follow these with the Ridgerest as a liner for form. Inside the Ridgerest cylinder, I place my food sack, followed by my clothes bag. On top I put anything that I will need quickly during the day. I put my rain gear in one side pocket and my misc bag and Nalgene in the other pocket. In the front mesh pouch, I place my 3 liter platapus water bladder with Safewater inline filter. I carry from 21 to 26 Lbs in this fashion.
As for the hennessy Hammock, ( I’m on my 3rd model now 
Staying dry is easy. Be sure to pull the rain fly tight from both ends to cover the knot things, then stake out the rain fly lines. This should cover the cocoon fully.
Another tip for setting up the Hammock in the rain, is to have an extra line running from each end of the rain fly to tie to a tree. This way, you tie the rainfly to the tree first and you can take your time hanging the hammock as its under the fly the whole time. When you get ready to take it down, drop the hammock first, pack it up, finish packing your pack, then drop the rainfly which is still tied to the trees. You stay dry the whole time this way.
As for storage of your gear, I put everything in my pack and covered the pack with a garbage bag or good pack cover and leaned it against one of the trees. I used down Booties as camp shoes and brought them into the hammock with me.
This system worked very well in dry or wet. Several times in camp, people remarked that I was always the first one set up and the first one packed up and always stayed dry 
PS: get a pack with a Hip belt. I hate weight on my shoulders !!
Rebel, with a Cause !!
Rebel, with a Cause !!