I know this thread is old, but I found it helpful.

I have on 06 Ultra and I'm swapping cams and upgrading to hydraulic cam chain tensioners.
Before installing the new bearings into the cam plate, I put the bearings in the freezer overnight.
Today I put the cam plate in the oven at 350 degrees for 10 mins. I pulled both items out of the oven and freezer and the bearings slid right in.
No need for a hydraulic press.
I put a little oil on the outer race of the bearings, but I don't think it was needed.
Once they were in, I tapped them with a large socket and hammer to make sure they were fully seated and flush.