Route 965 doesn't go to Chong Pang Camp, but you can still take
it to Yishun Avenue 2 and transfer to route 169. My recommendation,
though, is to take route 969 from there, alight at Chong Pang Camp
(the Air Force camp), and then transfer to either routes 167 or
980. Ask the bus driver where to alight if you are not sure, but
you should be able to catch sight of the camp's entrance just
before it's stop (tip: look on your right for a Nee Soon Camp
signboard).
You will have to walk along a short stretch of a side road
(there's a short row of shophouses on the left when you walk into
the camp) before you reach the guardhouse, just right after a
condominium's entrance.