If you know your arch. Tread Labs has 3 different arch support heights and 3 different pad styles. The pads can be changed out when they wear, without having to get another arch support. They also have a metatarsal support pad option. Most comfortable of all the inserts I have used. Just...
Will you be packing in water or be close to a water source? Peak meals use 10-10.5 oz of water per meal. Then add in you're drink mixes plus the water you'll be drinking for the day. Just something to consider and think about.