Best way to notate an inexact quote in an academic paper?

As in “The most important thing you can to is (think about) your estate plans, to ensure the (continuation) of this art form.”

I didn’t have a recording device with me, but at the time scribbled as fast as I could. The words in parentheses definitely had that meaning, but I’m not POSITIVE they’re the exact words. []? ()? Paraphrase instead of quoting (that would really kill the dramatic effect)?