I'm glad you had a nice get together and I hear your "fretting" about what to say to your children and I am glad you were able to relax and just "be" with them.
For me, I found sharing my deepest fears and concerns was best done safely with others in recovery, like here or at meetings. Sometimes family is too close to understand without getting emotional, how we feel. Family should be close and one day you may be able to share more with them, but sometimes keeping family as family and recovery friends as recovery friends is a good choice.