couldn't agree more re organisers- not having a go at any one least of all the organisers- just disappointed i couldn't do both and pointing out lack of evidence-informed decision making (its what i do)...
given the choice I'd say fellsman is the better race- cos its longer, you run in the dark and go over squelchy stuff but theyre both great, and really your'e comparing apples and oranges...
lots of gen on nav for fellsman on threads- but you shouldn't have any probs if you're halfway competent with map and compass (saying that- I'll probably get lost this year- and serve me right too!)