Given the distance I'd be a bit worried wearing brand spanking new fell shoes; the last thing you'll need is blisters - I ran in fairly tatty fell shoes last year and passed the kit check okay. They did inspect the grips though and looked for splitting seams and whatnot. Scuffing can't be a problem can it - its rare to be able to actually see the scuffs on mine through all the dry mud and peat and, if in doubt, camoflage the scuffs with mud