At the end of the path you see, the trail goes downhill. There we passed two barking dogs - she was nervous but stayed well-behaved on a loose rein. Then we reached the end of that trail and started to turn left on the way back around the pastures. It quickly became clear that the only thing on her mind was getting back to the barn and a major meltdown was on the way. I got off, and we alternately led and stood all the way back to barn. We completed our circuit of the pastures, at the pace I set and in the way I asked, without a big fuss. Maisie leads very well, and it comes in handy at times like these.
The first half of our walk home she was about to jump out of her skin - much snorting, startling and bit-chomping. I made it clear that walking on top of or over me wasn't part of the program. She is a very big horse, and this is important. Sometimes when she's nervous, she wants to walk very close - too close - to me, perhaps as a means of comfort. Occasionally I used a well-deployed elbow to encourage her to not move her shoulder too close to me. Any time she walked nicely next to me the reins were loose, otherwise I asked her to slow. She mostly stayed pretty responsive despite her excitement. I was particularly encouraged that she got more relaxed as we went around. We did lots of stopping and standing - I took advantage of the fact that she stands very well on a loose rein.
When we got back to the barn, I remounted and we walked around some more in the vicinity of the barn on a loose rein. We ended on a good note - and I got a solstice ride, and walk!