Denali Sleep System

Trip date: May 28- June18

Sleeping bag I am satisfied with which is the Thermarest Polar Ranger -20F.

My main question is will the new Nemo Tensor All Season (5.4R) paired with the Switchback (2R) be ok?

It seems most people are going with the Nemo Extreme (8.5R) or the XTherm (7.3R) paired with the Switchback. 

There is a lot to be said having a "solid" pad as it can be used to sit on in the kitchen, be used as "tarp" to put stuff instead of the snow, as well as emergency use. Best of all no repair issue. The biggest draw back is the bulk. But if schlepping a sled up the west butt that is the least of your issues.

Noah Hinson wrote:

Trip date: May 28- June18

Sleeping bag I am satisfied with which is the Thermarest Polar Ranger -20F.

My main question is will the new Nemo Tensor All Season (5.4R) paired with the Switchback (2R) be ok?

It seems most people are going with the Nemo Extreme (8.5R) or the XTherm (7.3R) paired with the Switchback. 

Yes.  Given you'll be up high in June, it'll be warmer and your time at 17k (or thereabouts) will be limited to hopefully a night or two.

Our trip was about the same time frame as yours (a skosh later as we summited on 17 June) and I was comfy in a similar sleeping bag (-30 feathered friends) paired with a light therm-a-rest air mattress and a ridgerest foam pad.  Bulky, but, as ARS mentioned, pretty sweet for sitting on etc.  We spent 4 nights in fairly crappy/windy weather at 17k.  No memory of being cold when in the sleeping mode.

Good luck up there!

You might want to include a vapor barrier liner for your sleeping bag.  Adds lots of warmth for very light weight.  And if you're too warm, just sleep on top of the vbl.