Remarkable trek, remarkable images.
Can I ask what kind of gear you used on this trek? As in boots, clothing, what kind of layering? I'm fascinated by the choices made by real people doing treks, rather than what company marketing tells you that you need.
Most of the stuff I used was gear I already had for personal and professional use at home in Tasmania (I was guiding commercially at the time). This meant that a lot of it was probably heavier than necessary as I had chosen it to cope with Tasmanian scrub and getting bashed around on commercial trips. A high-quality ultra-light kit would probably be more suitable, with some caveats...
Keep in mind that I generally run hot and on this trip I was perfectly comfortable with only base and mid-layer insulation. Someone who feels the cold would have definitely wanted something more substantial at times.
From memory:
Boots: Scarpa Delta GTX (worked well)
Pack: One Planet High Plains 76lt (worked well for the weight I was carrying)
Tent: Hilleberg Soulo (worked well - there's very little protection in the highlands so stability was important, and an enclosed inner was great with all the dust)
Stove: Soto Windmaster (struggled as it was very difficult to keep it clean and keep dust out of the o-rings)
Mat: Thermarest NeoAir X-Therm (excellent, comfortable and very warm, probably overkill though)
Sleeping bag: Sea to Summit Micro III and STS silk liner (excellent)
Clothing (walking): Asics running shorts (I find proper hiking shorts heavier than necessary and uncomfortable, and I don't like wearing long pants walking). Merino T. Merino long-sleeve leggings and top. Earth Sea Sky synthetic mid-layer top. Merino buff. Merino gloves. Mountain Designs GTX jacket (heavier than necessary). Wilderness Equipment Raindance waterproof pants (heavier than necessary).
Clothing (tent): As above, plus Earth Sea Sky fleece pants and Arcteryx Atom hoodie.
There were a few big gear lessons I got from Iceland:
- Ambient temp is not particularly cold, but the wind and moisture is brutal. Good wind protected is more important than insulation.
- Lava is very abrasive and when it turns to dust it gets in to everything.
- During summer it never gets dark - a headtorch isn't necessary and carry an eye-mask if you want to sleep (24hr daylight in a tent isn't much fun).