Can you show us where you are at so far? Seeing the actual layout might help.

Do you need U/lc or is all UC ok?

All Upper for the invite, but for the accompaning pieces I might like to use some L/C.
Here are two variations on the theme Trajan (top) & Requim (bottom). The blossoms will be made perfect once I decide on just one or two bunches. Please weigh-in on which is working better.
I should mention the invite will be letterpressed. The colors are silver for the border, some peony pink for the flowers and names, and a brown for text.
Thanks!

I’m not sure either really go; Dear Sarah is a pointed pen script, but Trajan and Requiem are shaped by a flat brush or nib (and are much more formal too). Of the two I think Requiem is the better match, but look at something like Bulmer, or Fry’s Baskerville, as well.

why not just use the small caps of Dear Sarah for the rest of your text? that way you can keep the same feeling throughout the whole invite?

You could try Mrs. Eaves. I like it because it seems like a slightly feminine Baskerville, which was its starting point.

Mrs Eaves would be stylistically perfect, but it might be a bit low on contrast to really function letterpress; one of the nice things about it is that it has, as it were, built-in inkpress.

I think you could also consider an elegant sans serif like Sackers Gothic, Nobel, or even a light weight of Futura.

I like the bottom design better but both are quite nice. I’m not in love with the grey border, maybe it could be a little lighter either in tint or in weight.

Why does Barry get a “Mr.”?

Have you considered an ampersand between the names? Dear Sarah has a nice one.

and of course congratulations.

A local institution uses Mrs. Eaves with Dear Sarah and it works very well.