I usually run on more or less the bearing stated in the literature, and if you know where to look there's a trod that heads like an arrow towards the cattle grid checkpoint.
Self clip is really easy, as you go through the steel gate, head straight on up a muddy path onto the grassy steep hill with steps and it'll be obvious.
I ran that hill on Sunday 6miles in to a 12miler. It's bloody hard but doable if you slow down enough (I was around 15min/mile pace for the mile including the hill). On 'race' day I doubt I'll be capable of running it though!