With that short little lead on Sunny, I was afraid I may not be able to slip up close enough to catch her. Although there's a bit of 'let's walk around the paddock' to start with, she's been relaxed enough to allow me close enough to snag the end of the rope. Hooray!
Our biggest issue (our, meaning the two of us) is getting her to relax enough for me to cross to the other side of her body. No clue how long that will take. For now, just have to be happy with the little baby steps!