redbirdrbi,
Here is alink we used when looking for house, maybe you already have it.
www.cooperstownny.com Patsy Soule
Cooperstown Accommodations
888-547-1381
I stayed with one other family in a house that was called Chestnut Street Apts. We had 2 beds and a pullout for 5 people. Our location was a little noisy because we were at an intersection so if you opened windows, don't plan on leaving them open when you sleep. We went last summer when it rained so bad they cancelled most of the games. One thing to consider is the families that rented out a bit had to evacuate because of the flooding. Now last summer was one of their worst so more than likely you won't have to suffer through it. I am used to clean hotel rooms, not 5 star or anything, but an old home doesn't always keep the bugs out. And with all the rain, I was sleeping one night and the dropped ceiling fell on my bed. We had several leaks and nothing was really fixed, just bandaided with pots to catch the water.
It is a fun experience but a fairly pricey one. One family told me since they brought their entire family for the "experience", it cost them about $5000. This was one of the families that had to evacuate and she said she would rather have gone to Hawaii. Because of the water we were taking the boys into town and feeding them there instead of at Cooperstown since the rain got boring after the first day.
Not trying to sound pesimistic because the boys do have fun and it is unique. Just wanted to share our experience.