For gas stations, are you aware of gasbuddy.com? It show general location and prices on a map, if you zoom in close enough.
I recommend spending time along the Lake Superior shore north of Duluth. Nice state parks with rivers, falls, and scenery. Stop at Palisade Head for a great view of the lake from high above.
Not sure about the skeeters, I have not been there later than early August. They did not seem too bad then along the lake.
Mike G.
Liberty is meaningless where the right to utter one's thoughts and opinions has ceased to exist. That, of all rights, is the dread of tyrants. --Frederick Douglass
photo: Yosemite Valley view from Taft Point