Sounds like planning ahead really paid off, especially at the end when you were tired. Since you already planned your routes, all you have to do was execute them. Nice run!
Yeah i found those fields very helpfuly as well. Espeshally when it was up hill in the fields when my knee didn't like it when i ran. I used them a lot on day 2 to at lest look over the next controls, i didn't memorise my route chouses though (maybe i should have)