About your earlier questions regarding sight seeing, here's my reply to a similar question in the past
From experience, I can tell that there is no check points on N-5 from Sukkur to Karachi where there is regular snap checking. NHA police is there with their speed guns and all, but they are only doing their duty for a smooth traffic flow and serve the commuters. I did not see any snap checking all the way to Lahore and back, except at the rangers check post at Kot Sabzal which is the border town between Sindh and Punjab, and once I was stopped for over speeding near Rahimyar Khan.
If you are taking all necessary documents with you, do not worry and stubbornly, but politely deal with anyone who stops you anywhere. I doubt that you will be stopped enroute, but God forbid, if you would, tactfully handle the situation and never ever give them a single rupee. The more you waste their time, the more chances that they will let you go to pick someone else. Their usual questions are: Where are you coming from, and where are you going, just to ascertain how much urgency you have to pass through. I know some friends who used to tell that they are going to Pano Aqil Cantt to meet their brother/uncle Colonel/Major so and so and it used to be enough for them, but that's also a thing of the past now.
So get your papers in place, keep calm and enjoy the journey.