The Fingers have landlockeds and I like Skaneatles, Cayuga, and Seneca. The last three years have been awesome for landlocks after a 20 year lull in activity, However, lakers are the real bread-and-butter fish of the Fingers and salmon are typically a bonus fish or a something you have to work for. The lakes all have their own character and fish slightly differently - so one lake might be better than the others on any given day. The fish are a little smaller in Skaneatles, but the gin clear water, the lack of alewives, and the mixed bag make it my favorite.
Generally the fly fishing is good when the water temps are below 50F - warmer than that and they are a little too deep for the best fly fishing IMHO. That means from November to May more or less. A little wind ripples (the famous "salmon chop") helps the salmon feel comfortable right under the surface. Sometimes the best fishing is in the worst weather. For the shore bound angler, the one hot spot on Seneca is off the salt pier in Watkins Glen - but here are other points they show up on now and again and there are times they will cruise the mouth and marshy part of Catherine Ck. They also hang around points, especially when there is a north or south wind to get a wind driven current going. Some points are open if you ask since most of the cottage people aren't around in the winter, but bad behavior by fishermen has hurt access for the last few years. A guide I can recommend is John Gaulke.