Myself and Frankie Abralind and Lindsay Madera have a couple of classes coming up in Brookeville MD- not exactly Baltimore but I expect to see some of the locals there.
We're also doing a barbeque/social on one of the nights after the class. This will be at Frankie's fairly large-scale biodiesel site (at a construction fleet's yard), and I"ll also have small-scale biodiesel Appleseed equipment with me on a trailer. We'll run my system in this class and talk about the finer points of preventing spills, quality control, equipment tricks, etc.
For more info see my classes page: www.girlmark.com/tour