Mix the plan A and C. Go via route A. and return back route C. Drop plan B.
Jalkhad-Babusar-Chilas area, do travel in daylight only. Once you are on KKH, you are safe ahead chilas upto Hunza etc even in midnight.
As you are 4 persons.. and its in day light. So no risks. don't worry.
You can make upto Attabad Lake dam. From dam take a jeep. It will cost Rs. 1200/- return... with 1/2 hour stay. The last few km of lake are very inclined as well as kacha and powder mitti. You can even trek this portion. While go on this portion, you should be in bathroom sandal and used clothes.. Even get a mask or handkarchief (romal) for your mouth cover. apka hashar nashar ho jae ga...
Weather.
Naran and Hunza - Pleasant at day/cool at night = Just an upper will do in evening time...
Chilas and KKH - Hot
Gilgit and KKH Mansehra to Dassu - hot in day, pleasant in night
Road condition and travel time
Mansehra-Jalkhad - Best road on your way - 6 hours
Jalkad-Babusar top (Some water crossing) Kacha gravel lavelled road- 2 hours
Babusar top-Babusar Village = All descend Kacha gravel road (I think one hour)
Babusar Village to Chilas = (2 hours approx) mettalled road with portions of kacha patches...
Near chilas = A gravel narrow trek leads to chilas village.
Chilas-Raikot = Good road mettalled . (less than 2 hours)
Raikot-Jaglot = Kacha gravel road -- Levellaed bajri road 3 hours
Jaglot-Gilgit = Kacha gravel road -- Levellaed bajri road 3 hours
Gilgit to Hunza = Kacha gravel road -- Levellaed bajri road 4-5 hours
Hunza to lake = Kacha Gravel road (one hour)
Above time taken includes photography/fueling/mealing/tea breaks...
From Gilgit to Pindi via KKH, it takes 22 hours... so mentally prepared...
I recommend you to travel in day light to avoid tiredness and enjoy the scenery.
Must take the Zong sim... Mobile coverage will be at Naran only, then in Chilas Telenor works. and ahead chilas mostly zong coverage in almost all small/big towns and major portion of KKH
While you on travel.. Eat what the local eat/ drink what the local drink (Halal only). Dont take much concern to food/hotels... Big cities ma apko har tarah k hotel khanay mil jaen ***.. in smaller one, you will have to eat, what is cooked.... You can also bring tin-food.
Follow my thread for road conditions etc
https://www.pakwheels.com/forums/road-trips-vacations/171951-solo-flight-north-pakistan-2011-biking-hiking-hitchhiking-jeep-safari-natco