The Eire canal system holds some of the largest fish you will find in your area Carp. Since you have access to the canal in Seneca Falls you are in luck. You may have to try some different methods to get quantity and quality of fish though.If you would like to try I suggest you visit the American Carp Society web site. Look at the tournament results for the Northeast Regionals from the Seneca River a part of the Canal system. I visited there when it was happening. This spurred my interests and I fished there a couple of times this year catching carp close to 20Lbs. Carp have a bad rap in the USA, but the rest of the world does not. I know the canal system holds Carp close to 40lbs.
Some of the larger Finger Lakes tributaries offer some big trout in the spring. Naples and Catherine Creek
Some of the tributaries of Lake Ontario also offer good chances for big trout and salmon in the spring and fall.
I have a boat, but I still stream and pond fish during the season. Large size is not always the target, but sometime putting a plan together and catching the targeted species is just as enjoyable.
Sincerely,
georged