I went to a similar weekend over the Christmas hols and about 25-30 people were there it was brilliant.
we did a team interval session Saturday morning and a mini mountain marathon stile score event in the afternoon, then Sunday when for a long run.
the "Capricorn" event was held on the side of Whernside 3 years ago maybe you could use some of the same controls?
I also have an Orienteering back ground, and would be able to help with the coaching side of things, if i am able to come.