Sorry, long post! I have a medtronic 780g and G4 sensors. I will be doing a 5 day trek through the Iceland Highlands (Laugavegur & Fimmvörðuháls) staying in the huts. I currently exercise 1-2 hrs most days using temp target in the morning before I've eaten and this works really well. A one day hike wouldn't worry me but I've no experience of through hiking and will be carrying my food and clothes, so the effect of carrying a bag, wind, and terrain variables will obviously have a huge impact on blood sugar levels more than the actual distances I think (the daily distances are variable but not vast, probably average around 6 hrs walking). My DSN has been really thorough and we've discussed adjusting various pump settings and carb intake strategies but I know I'll have to work it out as I go along. She also pointed out at the end of the trek the pump algorithm will be working on the previous 7 days so I need to be on the ball managing everything afterwards. I will have glucogen pens, and plan on taking a sensor libre as well as pens and spare consumables for the pump. I have time to practice hike with my loaded back pack, and I can study the route map for the harder parts to really carb up. I have read some T1 hikers blogs which have been really helpful. I'm fairly fit and have been weight training on top of my usual exercise. I do feel prepared and think I've thought of everything but I do feel more nervous than excited and I wish it was the other way around! I'll be 60 next year and this is a holiday that I'll probably never repeat. I think theres a bit of hype about the trail because of its remoteness and obviously (hopefully not) extreme icelandic weather and I've let this worry me too much as I do believe it's well within my ability. I'll be with 2 other people who are experienced hikers. Food that I'm carrying will add to back pack weight so really thinking I should shell out for the (expensive) dehydrated meals if anyone has an opinion about this, but any top tips in general or even just reassurance would be great! TIA