It worked amazingly well! Two dogs who couldn't be around any other dogs at all were allowed to get past their fears by saying hi to another dog without anything bad happening. Juneau had her muzzle on for 5 minutes before it was clear she was very calm and mostly ignored the other dog. Then my sister-in-law's dog had his taken off after about 10 minutes. They played together for the rest of the time, just hanging out. It was wonderful.
So I haven't forgotten about Juneau, and things are ongoing. I figured no one wanted to read a "Juneau continues to learn to heel" post. As things get warmer (and lighter after work) I hope to have more outside time with her.
We are also in the process of trying to buy a house with a yard. THEN there will be many dog interactions of a positive nature.