You can join a group interactive program on sustainable farming and development at one of their farms in the USA, or join an international study tour.
The farm closest to Baltimore is in Sharpsburg, MD:
Heifer global village at Shepherd's Spring
Another farm with a food course:
Overlook Farm in Rutland, Mass www.heifer.org/overlook
Harvest Time: Immerse yourself in this course on food systems, sustainable agriculture and self-reliance techniques.
October 9-12 (co-ed) or 13-16 (women only)
And here are some books on the topic of preserving produce...
Ball Complete Book of Home Preserving http://www.amazon.com/Ball-Complete-Book-Home-Preserving/dp/0778801314/ref=sr_1_1?ie=UTF8&qid=1309873375&sr=8-1
Canning for a New Generation... http://www.amazon.com/Canning-New-Generation-Flavors-Modern/dp/1584798645/ref=sr_1_1?ie=UTF8&s=books&qid=1309873395&sr=1-1
The Complete Book of Pickling http://www.amazon.com/Complete-Book-Pickling-Relishes-Chutneys/dp/0778802167/ref=sr_1_1?s=books&ie=UTF8&qid=1309873419&sr=1-1
Jam It, Pickle It, Cure It... http://www.amazon.com/Jam-Pickle-Cure-Cooking-Projects/dp/1580089585/ref=sr_1_1?s=books&ie=UTF8&qid=1309873440&sr=1-1
Wild Fermentation... http://www.amazon.com/Wild-Fermentation-Flavor-Nutrition-Live-Culture/dp/1931498237/ref=sr_1_1?s=books&ie=UTF8&qid=1309873458&sr=1-1