I know of some good spots near greenfeld but they are probably to far away though. One spot that is good to drop a canoe or kayak in for a few hours is lincoln pond, right along 101 in amherst, my dads friend has caught several 3.5+lbs fis in there and he has claimed to have fish next to his conoe close to 5.5lbs. Lots of great underwater cover for big bass to hide in, I have been once this year and plan on going again, probably couldn't work a crankbait in there, i would suggest rubber worms and try to work them in deep gaps of cover, i think it will produce more bass in the spring but i think you should definatley give it a try if you are in that area.
(you park right along the road then a path leads yu right to the water, can't miss it...)