Hi Marty, I’ve been running pie test build most of the time since last August, currently on 0.10-p- of 14 Aug. I was just posting to another user about what works with it; see here.
What I forgot to mention in the other post is that the test build has not had any updates since August. There will be an official Q version out anytime now anyway.
I’ve not had the camera or random reboot problems you describe. Bluetooth I don’t use but just tested it sending files to another phone and it worked OK. Bluetooth is notoriously random with what pairings work or don’t anyway.