I think the list with no gloves was Jonathan's, so that advice was for him.
It was the silk baselayer I figured would be too lightweight. I personally haven't found silk to have any warmth. Your mileage may vary! If your midweight is the REI midweight, it might be too warm. Lightweight might be better--something between silk and the midweight. I usually don't wear my baselayer (Capilene 2) while I'm hiking, except when I substitute the top for a shirt. I found that the flies in the Wind Rivers (just south of where you'll be) bit right through the thing, though. That's the main reason I now take a very lightweight windshirt--to keep the flies (deerflies and enormous horseflies that look big enough to carry away a horse) off me when I stop.
I take a vest (very lightweight fleece) for layering over the base layer under my windshirt while hiking, but I don't need it until the temps get down to freezing. That's while I'm moving. When I stop, on goes the puffy jacket (mine is a Montbell UL Thermawrap), and there have been times when the puffy jacket plus vest plus the rain jacket over the base layer have all been needed. I get well heated while I'm hiking, but i'm a cold sleeper and also get cold really fast when I stop, which is why I bundle up the instant my pack comes off!
The Nanopuff is warmer than my Montbell UL Thermawrap, so you may not need the vest. I like to have a couple of thinner layers so I can thermoregulate better, but that's me.