Tough to tube on the weekends, I had a hard time finding a quiet area with enough space to run a tube with my 21' footer, west of middle bay (Baldwin heading to Reynolds Channel) as some deep water outside the channel markers, and I even stayed near the Lido Beach golf course one day, south of the channel. I second Merrick Point. Neither offered the running space I would have liked but the guests were thrilled.
Notice in your profile that you have an '07 Bayliner 285, I own an '02 2855, great boat, never tubed with it yet! I'm in Freeport, on Hudson canal, where are you?