Hi @dadcue, That's a great question. My own personal opinion is you will know you are in remission when you have minimum to no pain when you wake up in the morning besides the normal aches and pains of old age (that's me!) and you are no longer taking medications for treating PMR. You will notice that we have moved your post to an existing discussion where others are asking the same question here:
--- PMR - How will I know I am in remission?: https://connect.mayoclinic.org/discussion/pmr-8/.

You might want to run your question by your rheumatologist but it is a great question to ask.