You may want to consider Navionics+, it covers all of US and Canada with Nautical Charts or base maps, you download the High Def SonarChart layer for the area or areas that you fish. You can have multiple high def areas, and the base map for all of US and Canada.
Go the web app at this link and preview the lakes you fish, click on the Icon on the lower left corner for the High Def SoanrChart layer. https://webapp.navionics.com/?lang=en#@6&key=%7B~pqGv%7BfxP
Lake maps vary amongst manufactures you can look at Navionics before you buy vs guessing.
I can get you an example if you share a lake that you want to see.