You may take a bus from Ipoh to Cameron Highlands. Having said that, I recommend you rent an automobile as you can have the flexibility of choosing which places to visit in Cameron Highlands! Another wonderful solution is to have a day journey tour from Ipoh with a tour https://mygirl2u.com/area/mountaustin-girl-service-%e7%be%8e%e5%a5%b3%e4%bc%b4%e6%b8%b8%e6%9c%8d%e5%8a%a1/