We went on a little camping trip, with the intention of chasing some ice cream. I didn't know this before, but the park contains a historic site within it including an 1804 house, grist mill, canal and other structures. I didn't take any pictures, but I can recommend that you visit the site if you are in the area. The structures are well-preserved and the grist mill is fully open (though not operational). You can climb all the way to the top floor!
We were able to join up with a group for the house tour, which meant that we jumped in right as the docent was getting to the slavery portion of the tour. I was glad to hear him speak at length on the experiences of slaves at that farm and in the household. Visitors were even allowed to climb the very steep steps to the attic where the slaves slept. As for the family who owned and operated the house and farm, they had an interesting story related to their son's decision to fight for the Confederacy during the Civil War.
We also spent time walking along the canal paths, and the role of the Susquehanna in 18th/19th century Baltimore commerce was on my mind the entire day. Just last week, I was looking over some accounts from a 19th century Baltimore merchant, Frederick Hammer. In 1812, this man invested over $10,000 in turnpikes alone. These roads connected Baltimore to places like York and Frederick, but his financial support went to other projects that connected York and Conowego (Conowingo - where the hydroelectic dam now exists). Hammer also invested in canals, banks and insurance companies.
Walking the paths and visiting the structures that are left from this period renews my intellectual interest in their conception and use. I'm very grateful for the opportunity to spend a day seeing and experiencing these sites. So, thanks, Maryland Department of Natural Resources!
P.S. I chose "Mint Mookie" as my ice cream flavor. It was delicious.