How do I handle a long gap on my résumé? - what worked for you?

I took time out to care for a family member after working as a marketing coordinator. I am nervous about being filtered out. What do you say in interviews?

Thanks for writing this out. I went through something close to it last year, and it got easier once I kept a simple log of every call and form.

Keep everything in writing and save the confirmation numbers. It saved me later.