There won't be transportation from Binghamton to Geneganslet Lake in Mcdonough. Its a 35-40 minute drive to Binghamton from the lake. Please drink responsibly, have a DD or bring a tent!
Unfortunately there's no cell service. You can walk to the top of the hill (about a 10 minute walk) and possibly get a bar or two. There are landlines if there's an emergency.
Dressy casual! This is lake life so leave your ballgowns at home but maybe don't wear jorts. Wear comfortable shoes and bring a jacket.