If it were me, I'd use the walker, @rose4622. In my humble opinion, staying upright is more important than appearances in your situation. I'm sure your clients have seen people use walkers after surgery and if they comment about it, you can have a short statement prepared that you are being extra cautious since your surgery and then move the conversation along to a topic about them. I feel sure that the clients will be happy to have you there and recognize your kind, helpful manner.

If you care to share more, are you a counselor, @rose4622?