I'm in a similar place right now. My 7 year old Bernese had ACL surgery two weeks ago and goes in to have his stitches removed tomorrow. Not sure which surgery Winston had. My Bernese, Cooper, had TPLO, which has a faster recovery time and is supposed to work better on the larger dogs. Since this surgery involves reshaping the bone, there is danger that he'll damage the bone if he gets too rambunctious. He's going to need the other knee done as soon as he can handle it. We'll see how it goes.
I wish Winston a speedy recovery.