I have just returned from a family road trip from Islamabad to Skardu, which included the very long route through Astor, Rama and the WHOLE 6 hours of Deosai plains. The trip went very well and we are happy we did not fly to Skardu.
Will write my travelogue in about a week once I catch up with work emails 
In the mean time if anyone has any questions, please do email me.