Here are some charts and graphs, courtesy of Keith Zimmerman, that back up his point that St. Lawrence County isn't better off with more representation.
The gist is that when you split up St. Lawrence County into small pieces, legislators won't have to focus as much on its needs. If you're an elected member of the Senate, how much do you care about the 19 percent of your district that lives in St. Lawrence County? Not as much as you would care if your district were 90 percent St. Lawrence County.
Some other facts and figures are there for your perusal.
The first graph shows Senate districts, and the second shows Assembly districts. The blue portion of the bar shows what percentage of each district is made up of St. Lawrence County residents.
The last chart shows the raw figures. Also note that other counties in the north country were not split up as severely.