No problem in murree. If you go for a visit but yes on Eid holidays it will be flooded with all kinds of people.
Better stay in bhurban or nathiagali or ayubia if you want to visit galiyat in day times.
Stay at nites and visit places in day times
Abbotabad is a different route over all.
And from galliat you can move to neelam valley muzzafarabad