ah.. Eid -- it would be an 'Eid ka Samaa' on these 'picnic points' and roads leading to them :D. May travel early so that you can avoid getting stuck in traffic jams specially the murree segment.
For neelum valley, keep your original docs mainly CNIC (of all adults if possible) there is always a need. You can get an SCO sim from Muzaffarabad or from Athmuqam if you plan on staying in touch with your family back at home. Since our Pakistani Networks will stop working after crossing Pattika (I think) on the Neelum Valley Road.
Please do follow the instructions mentioned on the signboards and (if any) precaution -- on the checkpost -- reason is that several sections of neelum valley road are right on the LoC (Line on Control) but no need to worry, people travel all the time.
Stops & notable places can be Dhani Waterfall, Kutton Resort, Little Bazaar at Jagran Bridge, Keran, Dawarian, Ratti Gali Lake (jeep), Sharda, Kel, Chitta Katha Lake (jeep), Arang Kel & Taobat (jeep)