Two different questions
Trailer Boats are Responsible for introducing nuisance species to other areas. (Such as Milfoil in Southern Maine)
How to deal with the issues of small craft versus large commercial craft is another. We all play a part in preventing the proliferation of non-native species. However I don’t believe requiring all of us to obtain some EPA permit will fix anything. People need education not a tax.
Wouldn’t the trailered boat issue be solved most easily by requiring that the bottoms of the trailered boats and their trailers be hosed down with fresh water before backing the trailer into the water and launching the boat?