Located downtown, the DoubleTree is right across the street from the Welcome Party at Lost Dog. P.S. is a further walk (about 10 minutes) but still doable if you don't want to deal with driving/parking on a Saturday night.
Deadline to book at this rate is October 1.
Binghamton has many other hotels to choose from if you're looking for lower rates, but DoubleTree is by far the most conveniently located for the weekend's events downtown. There are many chain hotels to choose from on Vestal Parkway and Upper Front Street (about 10-15 minutes away) if you don't mind driving or using cabs/Uber/Lyft.
There is also a Holiday Inn downtown that is about the same distance from Lost Dog and P.S., and usually around the same price as DoubleTree if you'd prefer to stay with IHG.