I would not wear the rings, since he says he's done he will perceive you wearing the rings as pressure or disagreement with his position. Also if he notices you're not wearing them he may start to worry that perhaps he can't just count on you always waiting around for him. If he asks why you're not wearing them then be mysterious about it, just say something like "oh yes, I quit wearing them a while back" and leave it at that.
Regarding the photos, that's your call. I took them down from my house just because it helped me detach, it wasn't to send any kind of message to W. There weren't many around anyway in my case.
I would not offer him dinner. He's coming over to work out separation, no need to make a date out of it!
