Everyone's opinions have been helpful. I've always used verbal cues with her, and lately I've been using them more along with touching her a lot so she knows where I am.
She does lunge, however due to the 2 feet of snow in Mass, I haven't been able to to anything but in hand and ground work with her, so she hasn't been lunged in a few months. I was planning on working her in a round pen this spring, but due to her newfound handicap I don't believe that's an option anymore. She's worn a saddle once before, but she is by no means close to broke.