4-6 people fishing on a boat on Lake Erie, you'll need something big, 18+feet, also, take into consideration what you have for a tow vehicle (ie. a Honda Civic won't be towing that). You'll need at least a 115 on the back because on the big lakes, the water can get rough quick when a storm blows in, you gotta get back to the dock asap. And the biggest question mark is how much do you want to spend????