hmm bro... you will b going to Chakwal from Motorway?? if Yes. then best route for you is to go to exit Motorway from Lillah Interchange from there its around 40 Kms and the road is two way but in good condition... and it will save u time...
from Chakwal to Choe-saidan-shah road is also Two Way not very good condition and narrow road for two way traffic and its around 75 kms i think... From Choe-Saidan-Shah to Khewera its around 10 kms... but extremely dangerous driving on Mountains... but i always love to drive there.. and to enjoy the awesome view of some cement Dandot cement factory from the mountains....
if u r going with family, i will recommend you to use Motorway, Lillah Interchange route.