How do I fuel for Indurance Sports?

Hi!

I just read Potatoes Not Prozac - and feel like I finally found my answer to my out of control sugar binging and yoyo sugar detox diets. Even the genetic explanation makes perfect sense(my father was an alcoholic and my mom lives on processed sugar and is very over weight).

Here is the thing though - I do endurance sports, 30 mile trail runs, etc - things where you have to eat sugar (cliff shot blocks, gu, gummy worms). How do I fuel for these if I give up sugar!?! EVERYONE eats processed sugar during these sports or else you cant get through the day.

I'm so, so, so excited to put what I learned to practice, but feel like the gus, shotblocks, and gummy candy I have to eat to fuel during sports and trainings will in the end derail giving up sugar and the next thing I know I’ll be back to hiding in my car, downing a pint of ice cream and 4 king size candy bars again. 
Also, on a less important note – do people add another meal after an intense workout? You kind of have to right? I mean for body recovery you need carbs/protein within an hour of an intense workout.