Oh yes I have fished the lake in June and July and I love it. The smallies will be on the rocks and gravel beds for sure. You can fish them all different ways and if you have young children with you, let them fish them with live worms and a bobber. The kids will have a real fun time. I am sorry to say that I have never had success with the Walleye June or July and have even talked to the locals there for tips on catching eyes and they all say come back in early spring or winter.
Good luck and enjoy the lake. Just watch for the storms that come very quickly down the lake out of the north from Canada; the lake can get very rough super fast. Don't forget you now need a passport to cross the lake into Canada.