You can follow following itinerary (considering minimum travel time as you are going for honeymoon so you wouldn't want to be on road all the time):
Day 1: Lahore to Islamabad, stay in ISB
Day 2 : ISB to chillas (around 12 hours), stay in Chillas
Day 3: Chillas to Hunza (around 8 hours), stay in Hunza
Day 4: Free day in Hunza, enjoy lovely weather, spend time with your wife.. Visit Duiker, Eagle Nest (for sunset), stay in Hunza.. U'll enjoy sunset at Eagle Nest..
Day 5: Visit Altit / Baltit Forts.. Go towards Sost.. Visit Attabad Lake in between.. Take boat ride.. Reach Sost.. Stay in Sost..
Day 6: Sost to Khunjerab.. May be u can't reach Khunjerab Pass due to snowfall.. But don't forget to travel on this road.. come back to Hunza in Night..
Day 7: U can stay in Hunza or travel back to Chillas..
Day 8: Chillas to ISB..
Day 9: Back to Lahore..
For hotels, if budget is not the constraint, then stay in PTDC Hotels/Motels in Hunza and Sost.. For Chillas, u can stay at Shangrilla..