This is what I typically do in my local pond from my float tube: Using a streamer and sinking line, I let out between 50 and 60 feet and kick slowly around the pond. While doing so I strip the streamer back a few yards and then let the line go slack and sink (repeat). This technique works well with a sink tip on stocked trout in the spring, and with fast sinking lines in mid-summer for panfish and bass. Deep in the kettle ponds on Cape Cod, I've also caught trout in the summer.
I'm not sure whether this is technically trolling or not, but it's enjoyable and works for me!