It's really about picking your days, and watching the forecast as your out there. I'm just learning about tuna fishing myself but we have caught small tuna 20-25 miles out of FI Inlet.I have also heard of nice size bfin being inshore (though we only had 1 small one this year)On a nice day you can do that on an 18-21 ft. boat. I would just watch weather and not be afraid to head back if it gets a little nasty.