Karim Abad is the most fascinating place in Hunza with two forts, royal garden, cafe de Hunza and so much more. People are educated and won’t bother you much when moving around.
You will get some real good hotels in Karim Abad. The top tier hotels in Karim Abad are Darbar, Sarena And Eagles Nest all very good and reasonable. However if you don’t get a room, don’t get upset, you still have plenty of options in that small hotel village. If budget is a concern you should consider hill top and embassy hotel.
You will get contact details, just Google the names I have mentioned. It will be really cold in Karim Abad by the time you plan to go. Make sure you book rooms prior to your visit and ask about all the facilities that you need.