Oneonta is a not a bad little town. I attended a baseball game there in 2007 I believe it was. The Tigers NY-Penn League was there then. They've been hi-jacked to Connecticutt since then. I recall that alcohol sales were not permitted at the park. My friend and I went across the street, bought a 12 pack, and went in and out between innings for some suds. The lady at the gate didn't mind at all.
Cooperstown has a couple of breweries worth looking at. Ommegang Brewery is not far outside town at all and is nationally known, they make good beer. There is another brewery outside town and I can't recall the name of it right now. It is a smaller brewery. The brewery has a baseball related name for what it is worth. There is a nice lake on the skirts of Cooperstown. They have an eatery or two down by the water and a tour boat...or two. It is an absolutely beautiful part of the country there. That's my recollection of our trip up. Of course, the HOF is a stop you'll never forget. Enjoy your trip.