Reddit mentions of Veho Muvi X-Lapse Time Lapse Accessory | 360˚ Photography | iPhone Accessories | Samsung Accessories | Muvi Kx-Series | Muvi K-Series | GoPro - Black (VCC-100-XL)

It was nerve racking and the wind wasn't helping at all. Plus I alway sit to fly back home so it was interesting.
I used this for the pan on the time lapse. Best $20 on camera gear in a while
http://www.amazon.com/gp/product/B00AJIZBWA?psc=1&redirect=true&ref_=oh_aui_detailpage_o05_s01

It's called a Muvi x-Lapse. Kind of like an egg timer with iPhone holder. http://www.amazon.com/Veho-VCC-100-XL-360-Degree-Photography-Timelapse/dp/B00AJIZBWA

I use this. I managed to get it for $11 awhile back. The cool thing is that it supports phones and the phone mount can be removed to put anything that has a 1/4 thread. You can also mount it on a tripod if need be.

It's essentially a more versatile version of the baking timer. The downfall is that if you want a full 360 view, you have to let it stay for an hour.

  I hiked Mt. Kilimanjaro last month over the course of 7 days.  Our group of three all had gopros and we each brought 5-7 batteries and an external battery pack.  <br />
  <br />
  Our 12000mAh battery would charge gopro batteries about 8-12 times depending on original/wasabi capacity.  I ended up only going through more than one battery on two of the days I think.  If you turn the camera off when you stop recording the battery lasts fairly long even in cold conditions (It would get down to 15 degrees F at night (-10 C)).  <br />
<br />
  As for memory cards I brought four 32g cards.  I like to have several smaller capacity cards instead of one big one in case one accidentally gets wiped or the data gets corrupted.  I ended up shooting ~60g over the seven days, including several long timelapses.  For a three week trip I would recommend two 64g cards if possible, or better yet four 32g cards.  <br />

I also brought a panning base (its a glorified egg timer) and got a few cool timelapse shots of sunrises and a few of the camps. Shot everything at 1080 60fps for video and 2s intervals for timelapses and turned out great.

Here are all the links. Good luck!

Anker 12000mAh External Battery
http://www.amazon.com/12000mAh-Portable-External-Technology-Smartphones/dp/B00CEZBKTO/ref=sr_1_8?s=electronics&ie=UTF8&qid=1410496236&sr=1-8&keywords=anker

Wasabi USB 2 Pack
http://www.amazon.com/gp/product/B00IAZWWDA/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1

SanDisk Extreme 32g MicroSD
http://www.amazon.com/gp/product/B00FRHTXW2/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1

Panning Base
http://www.amazon.com/gp/product/B00AJIZBWA/ref=oh_aui_detailpage_o04_s01?ie=UTF8&psc=1

If you want to use a phone, you can get something like this that will slowly rotate while you record. If it's captured in high enough definition, you can also do it in post.