Best bass fishing in Maine is probably anything in the South-Central part of the state, especially the Greater Augusta Area. Not gonna list all my favorite spots, but virtually any lake in that area is gonna hold sizeable specimens for both species, and you can get some absolutely ridiculous numbers during the summertime. Popular choices in this area include Messalonskee Lake, China Lake, and the Cobboseecontee Drainage. Another bass hotspot exists in the Sebago and Saco River Watersheds, but I've found those areas to be a lot tougher. Sometimes you can spend a whole 6-8 hour day and only pull up three bass at places such as Thompson Lake, Crescent Lake, and Kezar. However, when it comes to pure size and quality, absolutely nothing beats a Western Maine fish. There's a reason the state record was caught from Moose Pond and not Cobbossee. Fewer bass definitely equals bigger bass in my opinion, especially up North.
I think I may know the "puddle" you are talking about... Best LMB pond I've ever fished, period.😉
Will anyone get the location information out of me??? No. And even if I gave the spot away, there's not much public access to begin with. All I can say is that it's in the same drainage as Moose Pond.