The "DIRT" went 11.8 grams per tonne, page-57

Obviously the finer gold is the reason for the rc drilling as its the finer gold that will tell them weather is worth will with the bigger nuggets as the so called cherry on top. If this is the case then 1 rc drilling machine would cover alot of ground in 2 weeks depending on the distance they choose between holes. I have seen the srilling they do for blast holes on mine sites which is a little differant but a good indication on what ground you could cover
Also the depth would be really important,i would go with just 10m as gives you great guide it is fast and at a later date go back for deeper holes,gets this job moving a moving fast IMO