Jim.
I will also be in Bandon from the 5th-8th. We will have to meet up for a brew.
I've played golf at Bandon in November probably five different years now.
Only once, I think it was 2006, the day before Thanksgiving, was it unplayable. It hailed like nobody's business....miserable....soaked down to your socks and undies in the span of 6 holes.
Besides that, I have never missed a round. Definitely bring the rain gear....but also bring some short sleeved golf shirts...even shorts.
There is a weird pocket of weather in Bandon, Oregon, it's magical.