Thanks evilclive and Tony337.
I'm feeling reassured that I know what I'm doing. I've realised the difference is only a psychological one that I'm not in the safety of a built up area with medical facilities. I am used to self monitoring all the time during intense exercise and also on longer bike rides for example. I was worrying about the back pack weight (5 days worth of clothes, food, glucose, glucose,more glucose, and T1 kit) and the effect on me, but I've now dummy packed and thats helped to reduce the scare factor in my head. My friends will have glucogen pens and gels. They're well informed and I know they'll be vigilant, but I've not wanted to pass my anxiety on to them as this is their (very expensive) dream trek, so sharing with the T1 community has really helped me seperate my thoughts. I feel more excited than nervous now
Glad to hear about the shorts weather evilclive, fingers crossed for end of August.
I'll post an update.