Thinking of doing this as the timing is spot on for training, other events and holidays. Just a bit concerned that it might be a bit tough. I've done 1 marathon (London) which is obviously a nice flat road race. Just how much tougher will this be? Obviously I won't be going for a PB but running on sand sounds very tough. Looks like the scenery is stunning so I'm tempted to have a couple of days up there. Anyone done this race? Advice?