Should have posted this earlier but do be it. This is put on by Save the River. I attended last year's on the spur of the moment and really enjoyed it. I can't say how useful it was but I learned a lot. Recommended. Can just show up and register on site.
www.savetheriver.org
FYI
"Save The River’s mission is to restore, preserve and protect the Upper St. Lawrence River now and for generations to come through advocacy, education, research and stewardship."
They do good work.

Winter Environmental Conference - Save The River® Upper St. Lawrence Riverkeeper®
Thank you for attending the 36th AnnualWinter Environmental Conference Thank you to the attendees, volunteers, sponsors, and tabling-partners who made this year’s Winter Environmental Conference possible! Over 140 people attended […]

FYI
"Save The River’s mission is to restore, preserve and protect the Upper St. Lawrence River now and for generations to come through advocacy, education, research and stewardship."
They do good work.