McWill,
You could use that line and be fine.The flyfishing zones require that the line you use be tapered now. The rest of the river you can use a running line with no problem. If you want to become really good up there though IMHO use a regular flyline.You learn so much more about mending and line management.Also getting a good drift. This will definitely help you with your regular Trout and Smallmouth fishing.
IMHO a 2 weight might work. But IMHO you are spending some coin for a license, a place to stay,the Black River and a trip that if you get into fish will keep you day dreaming for years to come...possibly turn you into a Great Lakes Addict. Buy , beg or borrow a line that will allow you to highstick, mend, and swing. That way you can cover your bases without being limited.
As for the comment on Pacific Northwest and Great Lakes styles, Typically now a days most guys use Spey rods out west, they aren't fishing little creeks or bigger creeks for these ocean run fish {anadromous species} they are fishing big brawling rivers some with the only access is to hike in through the woods.Totally different than the Great Lakes.
The Great Lakes Salmonids are Lake Run {Pota anandromous}.
Aside from truly great large rivers like the Niagara , Gennesee also the Black Rivers.You will be fishing water not much larger than the Broadheads Creek in width and size to places as small as the Little Lehigh creek. Most guys now use switch rods that are from 10'6" to 12'6" in length. They are usually great for Steelhead and Lake Run Browns in line weights of 8 down to 6.