re your packing order: east fast simple ... except, the tent is last thing to be ready to pack.
Personally, and especially when its wet out, I want to pack as much as possible in my tent, where it is dry, and not have to reshuffle gear around to accommodate putting the wet tent at the bottom of the pack. Also, if I want to set it out to dry during a break or lunch stop, if it's at the bottom of my pack, everything again has to be shuffled around to get to it. Drives me batty (-er, anyway)
I like the Cuben dry sacks, MLD makes one, but I can get a deal on the GraniteGear version via REI, so I use those. Keeps the wet gear separated, and I can keep it near the top so I can get to it quickly if I want to take advantage of some sun to dry the tarp.