Wow those are so gorgeous I wouldn't want to cover them at all in the dining room. In the bed of course I'd want a way to close them when needed. Maybe a folding screen in there so when they were open you'd have the beautiful view.
I linked to JCPenney below. At one time they had specialty angles you could buy, but I couldn't find them now.

Here is a link that might be useful: bay window hardware

The link below shows corner connections that you could use to custom make your own curtain rods.

I've seen other connectors online and you may be able to find them at stores such as BedBath&Beyond.

For the dining area I wouldn't do more than adding panels on each side, hung on a short rod.
In the bedroom, you could use a flexible traverse rod if you want draperies that can be closed, but then you'd need to add a cornice to hide the rod.
I'd suggest calling a couple of mobile window treatment companies and getting their ideas on custom rods for the bedroom. All the ones I've dealt with will come out and do an estimate at no charge.

Here is a link that might be useful: curtain rod connectors

Those connectors are exactly what I was looking for. Thanks so much! I probably will just do a little valance in the breakfast room but right now my bedroom window treatment is a hedge. It will be good to have some privacy.