If you wanna stay a night in thandiani, there is no better choice than " Far Pavilion " which is adjacent to Army Guest House. It has two wooden huts with Double Bed. Bath rooms are " Just OK ". Hot water is available in the morning.
It has very nice lush green lawns surrounded by thick pine trees. Also has a kitchen and a dining room. Even if you wanna do camping, I recommend you camp at Far Pavilion's camping ground.. Its owned by a Retd. colonel and now being run by his son. There's no electricity in any hotel in thandiani so better charge your cell phones fully before leaving abbotabad. They also provide generator and last year they were charging Rs. 100 per hour.
Overall its a very nice place to do " Jungle main Mungle ".