Nice post rana sb. it reminded me some beautiful days of mine. I loved this trek too much,,, done 4 or 5, once with cousin and rest of the times alone between 2003-2004. Used to start from nathiagali to mukhspuri top via lalazar-then descend to dungagali to catchup pipeline treks till khiragali,,,,,,,, and then continuing walking khiragali to kuldana on the road and then murree adda for returing to islamabad.
You forget to take some pictures of the memory stones on the trek with dates. I think mostly or all of the stones are at dungagali-ayubia trek