This account describes a snakebite at the Ed Garvey Shelter in Maryland. I've redacted the names.
Venomous Snake Bite at Ed Garvey Shelter: On 8/1/07 Jane Doe, a teacher from [state] who was participating in the overnight field exercise offered through the Trail to Every Classroom summer institute, was bitten by a venomous snake en route to the privy at Ed Garvey. She was able to walk out under her own power to Crampton Gap, where she was met by EMT’s and [another person] and transported and admitted to Hagerstown hospital for treatment. Jane explained that she was wearing sandals around the Ed Garvey site and felt something bite the top of her foot and something “squishy like a garden hose” underfoot as she was headed to the privy around 9:30-10:00 p.m. She saw the bite marks and concluded that she had been bitten by a snake.