August 1-15 Walleye Trip

[Smokey]

I am planning on a trip the first two weeks of August and would like to catch a bunch. I am taking my mother-in-law who is 79 and avid walleye fisher. She will stay out as long and as often as I can go. Midnight or heat of sun. I would like to go somewhere in the Minnesota, South Dakota, North Dakota or Canadian waters to the north of those states. Any and all suggestions for fishing are appreciated. I had this mother-in-law for 35 years and don't intend to change fishing partners quite yet.
Thanks to all who provide info.

Smokey