Yeah, kind of along the lines of what MissPhoebe said, if it's going to have a recurrence, it will be along the lines of how arthritis works. Weather triggers it. Damp cold weather will just create a little more stiffness. Just be careful to do a lot of warmup walking before doing any hard core work. Also, I noticed coming out of winter, when it first warms up, tends to trigger relapses. You'll get to know her as to what's normal for her over the next few months. Just keep an eye on her and you'll be fine.
You just have to see your distance...you don't have to like it.