Escalante, early March

For those temps, I'd want a heavier long sleeve baselayer like a Merino 2 quarterzip. I'd also want a more substantial sleeping pad. You're gonna loose a TON of heat to the ground with only a Prolite XS. A 1/4" CCF would be absolutely mandatory, and still might not even be enough for a comfortable sleep (for the legs).

I'm assuming the heavy pack is for water carry reasons?

Thanks Brian. I'm usually good in a windshirt and short sleeve around freezing while moving (in decent weather). This is what I've used on trips the last couple weeks with similar weather. Same with the pad/sleep system. I usually don't need added insulation to the prolite until around mid 20s. Looks like this trip will be 3rd or 4th wk of March so I'm not too worried about cold. It's been low 70s the last few days at lower elevations.

Heavier/more durable pack is for water reasons and rock reasons, including a couple likely hauls in scrambling sections.

The most likely things to change:
-water. I might skip the steripen and just use ClO2. I might leave the Nalgene, but that's also usually part of my coffee system.

-still figuring out a good front carry system. Last weekend I used a bag with similar dimensions to the Zpacks multipack. I tried it on my chest, waist (in front), and attached to my hipbelt and bottom compression strap on my pack. The third option worked the best, but it's a little deeper than I'd like. I'm thinking long and shallow across my waist might be the best option. We'll see.

Looks good to me, only thing I'd sub is a Dromedary for the Platys (personal preference).

I have a 6l Dromlite that I actually prefer using to the platys, but like having multiple containers in case of failure rather than relying on one, regardless of its bomberness. I do usually have some kind of repair kit for my pad, so maybe it's not much of an issue.