In reply to zimpara:
Well yes, 100k+ for me is a long way, but as I mentioned there are other activities to be tagged on the end. My hope is to do a longish ride of 60k, a hike or run of about 5-7 hours, followed immediately by another 60k bike trip back home. It is possible but I need the right kit and the right food, plus the right training to build up. I am concerned at the moment with getting the food right, so I need ideas and options.
If you can do 120k with ease then you have my respect. You have obviously worked harder at it for longer than I have. Right now, 70k is my max but I am convinced that diet is the problem.
BTW - a can of coke when exercising pretty intensely is not the best idea. Caramel waffles sound good though...