Thanks, Gary, Carol, Carla, and all others who quickly replied. It seems the free Rock Creek Park lessons are on hiatus possibly due to repaving work at the site, and I'm still not sure when it may resume. In the meantime, I've relayed the information that Skater's Quest does a great job and is an available alternative. I know Danny has been involved for years and headed up the efforts at Rock Creek Park but I hadn't heard much about that lately.
Here's my response to the queries on facebook. Feel free to add anything if you'd like:
Billy Boyce