I cannot find EXIF data in Gimp using Ufraw as standalone OR plug in, even though I use the option save EXIF data - what could I be doing wrong?
I have found that many image editors modify and even delete metadata, and I am not surprised that Ufraw does that too. One way to transfer metadata from the original to the processed image is to use the very flexible ExifTool. It's a simple executable that runs on many platforms and has tons of features. Check it out here
The basic command to copy metadata in your case would be something like this:
exiftool -tagsFromFile IMG_1234.CR2 IMG_1234.jpg