Sure sir..
We usually took hotels with rooms varying from 500-800 /- room cost i.e. 250 - 400 per person... we also used train and bus for traveling from Lahore to Pindi and back. So, it's cost is also added...
So the cost of the trip goes like:
Fuel = 5000/-
Hotel = ((400+250)/2) * 12 = 3900/- (Excluded 1 day of camping)
Food = ~500*13 = 6500/-
Other traveling cost = 600 + 400 + 600 + 600 = 2200/-
So, in total the trip cost per person averages around = 5000 + 4000 + 6500 + 2200 = ~18,000/-