If you start the trail by the plaque there will be some poison ivy and thorns.
If you walk to the cache from the parking waypoint, there is a clear, unmarked path. This park is closed at sunset.
From the Maryland State Archive's summary sheet:
Originally called Cranford, His Adventure, the land over the years became known as Crawford's Adventure.
According to local tradition, the spring was used by British troops under General Ross as they retreated from Washington, DC through Bladensburg on the evening of August 25, 1814. Their retreat followed the course of present day Route 202. It is entirely possible that the troops used the spring because it is located just south of Route 202. Its use has not been established by reports of the day, however.