I had put bubble wrap in the shoulder straps, but the night before, took them out and put a sock in each one. Fold each sock and fill the top half of each strap. The socks do catch on the velcro, so there is a little fiddle factor. Normally, I put some cash, debit card and driver license in the bottom of one strap (zPacks sells a tiny cuben sack that is the perfect size for these). In the bottom of the other strap I usually keep my car key and a spare Photon II light. To be honest, I often wear the same pair of socks for two or three days, so digging socks out of the straps is not a big deal. On the Skyline Loop, I wore the same pair of socks for the whole trip. I just have fewer foot problems than most people.
I put a 1L Platy in each side pocket. I put a 2L Platy in the main compartment, laid on its side. Keep it low. If you keep it high, you have to fold the cap, because it is a little long. When I drank all of the water in the 1L Platys, I would then transfer the water from the 2L into the 1L liters, for easy access. In warm weather you are not digging into your pack for stuff during the day. My poncho, food and the 2L platy go in the bottom it that order. Quilt on top of that, the quilt will insulate the water and food and does help keep it cool. I had some M&Ms in my trail mix, which I did not notice. They did not melt, but the M&Ms in the daily food snack zip lock did melt. I will pay more attention next time. :) Wind jacket in the rear pocket for easy access. If it is hot, your back is going to get soaked with the Murmur, so a wind jacket is a big deal on stops if there is a breeze. Poncho in rear pocket if rain is possible.
We now we get to my pet peeve with the Conduit. A 1L Platy will not stay in the Conduit side pockets, they fall out! And you risk them hitting an object and springing a leak... big problem in waterless country. The Conduit is desgined for a Sports bottle, which weighs more (but is easier to drink from). I guess Brian was not really aware of the problem, until I sent him some pictures. The ULA Ohm handles water much better, but weighs 21oz. The theory of the Conduit's angled side pocket is easy access to water while walking. I think this "Industrial Engineering" efficiency factor is over rated; i.e. drinking water without stopping. I drink water about once an hour, unless the temperature is over 100F. I stop, and take a couple minute break. With a BW around 5lbs or less, you could just slip one arm out of the pack and grab a bottle, if one is a "5S" kind of person. I like to stop. The side pockets on the Murmur has made it my go-to pack, which the Conduit used to be.
Here are some pictures of the Conduit issue.
The Murmur is PERFECT for 1L Platys.
At first I was hesitant about the perceived fragile-ness of the Murmur pack material. I am now past that, and even did some awful bushwacking in it, resulting in a tear in one of the side pockets. I will try a piece of duct tape to repair it, or for under $100 a replacement is not a big deal.
I also was concerned about over-tightening the itty-bitty waist belt at the end of the day, when I got tired, to help transfer the load to my hips after a water fill-up. But the pack has performed flawlessly.
After seeing the Mariposa Video, I am thinking about getting this pack, and then maybe replacing the Ohm with it. I like the Y-strap for carrying a bear cannister, when it is required. Otherwise, I generally use a Ursak, since I am too tired at the end of the day to fool around with throwing a cord over tree limbs. But if I were doing your hike, I would opt for the PCT hanging method, using cuben sacks. I love cuben sacks. I have probably bought about a dozen of them in different sizes from Joe at ZPacks.
I really like the ULA products, but GG seems to have dialed in the little functionality things that make a difference during each day. I really like the hip pockets on the ULA packs, but when I need to go as light as possible, I take the pockets off the pack. The hip pockets are nice for a camera, but I have found the little pocket on the Rail Riders Adventure shirt is perfect for a camera, and it has a Velcro closure.
I hope all of this rambling is helpful.