In case of being run over, leave note to relatives / house mates, with insulin stash,instructing them to donate insulin to IDDF to send overseas.
In my 15 years since diagnosis, including leading a month long expedition in Costa Rica, 3.5 month expedition in Chile, Falklands & South Georgia, hut to hut cross country skiing in Norway, gite to gite hiking in Atlas Mountains, numerous multi day camping trips, including backpacking, kayak touring etc, in UK & mainland Europe etc, I've developed a few techniques.
I've always managed to keep my insulin within temperature range, using low tech methods such as stainless steel vaccuum flask, filled with cool water; keeping out of direct sunshine; not leaving in sealed tents and vehicles; simple evaporation cooling by wrapping in damp cloth and replacing water as it dries.
I eat anything and everything - including roadkilled pheasant, rabbits & geese shot by someone else, but gutted & prepared by me; line caught, gutted & prepared mackerel; meals prepared by Chilean ranchers - delicious, although carbohydrate content was a bit of a guess.
I guess that minimising carbohydrate in diet and maintaining high levels of physical activity could be helpful in making insulin go further.