The good news is that although initially the injury presented as a knee issue, it is not the knee and with lots of rest and a planned rehab, she'll be back at it. The bad news is this takes a long time (like 6-12 weeks of long time) and can reoccur.
There are few resources out there that talk about iliopsaos strain:
I've pulled her from all upcoming trials. At this point she can only walk on leash. The good news is that Dr. Sams has said that walking up to 2 miles slowly is ok. Some dogs can't walk at all so catching it when we did is a good thing.
I'll work with a PT professional to put a plan in place and hopefully when we next see Dr. Sams he will give the ok to start back at agility.