Me and some friends are planning on going out to Big Bend National Park on the 6th. We'll be staying for 3 nights and plan on doing the loop in the center of the park. We want to head up Emory peak, do the rim, and head down the Juniper canyon. It looks like this will be about 30 miles or maybe a little more. Am I right?
Over at bigbendchat.com they say to expect lows in the 40's but plan for freak storms putting it down into the 20's overnight.
Here's what I'm looking at bringing to handle a random night at 20F.
I'd like some input on clothing and my sleeping pad since I've never camped in temperatures that low. I figure the foam pad in the Jam (and the rest of the pack) should be sufficient under my legs.
Capaline 1 long underwear should be enough at night right? Probably more than enough with my bag and bivy. I figure I'll be fine for hiking with them and my pants. I may even be to warm. My Merino shirt is an I/O bio zip shirt from Back Country but I'm not sure on the weight because it isn't here yet.
I'm not opposed to adding a GG thinlight pad to my set up. Currently I have a Ridgerest regular I can bring but would rather not.
I think I forgot to add shoes and trekking poles to that list. I have BD poles and La`Sportiva trail runners. I'm not interested in spending the money to upgrade them to lighter items as of right now. And I'm not sure I could get that much lighter on the trail runners anyway with my big feet. They're 26.6 ounces in size 13 with a bit of mud on them.
This is going to be my first trip with the Jam. I just don't think I can fit it all in my Ion. I'll trim the Jam after I get back and know more about how it's going to function.
I also assume it'll be sunny during the day. So I'm bringing a wide brim hat for that and a beanie for night time.
I've been told I'll need to be able to carry a significant amount of water if it hasn't rained lately. I've got 3 liters of Platy bladder available. Should I add a water bottle?
Let me know if I forgot anything or if you have any advice about this trip.

