I took my girls to another contagious family to share suckers and juice cups in late Sept. It worked! My daughter caught it almost 2 weeks later to the day, and has blisters as we speak. Lots of spots still cropping up, so I'm thinking Sunday evening or Monday daytime would ensure you get exposure for sure!
If I have anymore contagious kids later in the week, I'll post as I find out. We live in Flint, MI, right at the highway intersection of I-69, M-23 and I-75. Find me on facebook at Carrie Hoffman (Central Mich.) and message me for directions/details, etc. I won't be checking the Mothering boards for responses, etc.