I can vouch for Mac's on that list. Nothing fancy. Just a drive up carhop kind of place. But the Root beer floats are great on a hot day and the burgers and rings are great. Well worth a summer or fall drive from Syracuse or Rochester.
A few restaurants I can recommend in our travels upstate include the Red Newt Bistro in Hector NY.
Red Newt Bistro - Red Newt Cellars and the Big Moose Inn north of Old Forge NY.
Adirondack Hotel and Tavern - The Big Moose Inn
Both restaurants have a water view and the food we were served has never let us down. Great service at both establishments. Please share your goto upstate Restaurants.