Maybe I'm reading out of context or just don't get what you're saying, but are you proposing a junk food diet for athletes? I gotta disagree that energy doesn't come from fat--fat has twice the calorie content of sugar. And are you saying that fruit doesn't have sugar?

I understand junk food cravings and the ease with which those are fulfilled, but I don't think it's a good idea for long term consumption. I like my pancreas. I'm married to a type 1 diabetic athlete so I'm a little more aware than most of quick carbs in the diet, and with diet in general. Of course, all things in moderation--including moderation. Machka's ice cream creations sure look good.

I've also hiked the AT, along with the PCT and CDT, and have toured cross country more than once. It's hard to avoid junk food on trips like that, but I do my best. (On my AT hike, I met a well-known hiker (the name would sound familiar, I'm sure) who attempted a JMT hike with nothing but Little Debbies brownies. He didn't make it.)